motor oil, any preferences? |
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motor oil, any preferences? |
jfort |
Jun 3 2004, 09:30 AM
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#1
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Senior Member Group: Members Posts: 1,137 Joined: 5-May 03 From: Findlay, OH Member No.: 652 Region Association: Upper MidWest |
I can believe this hasn't been discussed ad nauseum, but I did a search and couldn't find anything. Time to change oil. Any suggestions as to which oil to use?
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ArtechnikA |
Jun 3 2004, 10:02 AM
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#2
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
interesting...
i did a search on "Valvoline OR Mobil-1" and got 2 pages of threads ... |
newdeal2 |
Jun 3 2004, 10:11 AM
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#3
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Unregistered |
I have discussed this on Yahoo and the general anwser is if you don't run synthetic then go with Castrol GTX 20 w 50.
If synthetic go with Mobil-1 15 w 50 but it will "find leaks" so beware. |
MattR |
Jun 3 2004, 10:57 AM
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#4
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Advanced Member Group: Members Posts: 3,279 Joined: 23-January 04 From: SF Bay Area Member No.: 1,589 Region Association: Northern California |
Jake suggests Kendall in his video, but I need to find a store that has it so I can buy a case or two. All I can find are the big ones (penzoil, mobil, valvoline, etc.) at the locat chain auto store.
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ArtechnikA |
Jun 3 2004, 11:05 AM
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#5
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
Harley-Davidson used to specify Kendall, a HD dealer or bigger bike shop should carry it in quantity. my preference is Mobil-1 15W-50 -- that 0W stuff is great in modern water-cooled engines designed with appropriate bearing and hydraulic lifter clearances designed for it, but it's much too thin for an air cooled engine...
Jake's said here in the past that he likes Valvoline Full Synthetic and Royal Purple synthetic. i wouldn't use a synthetic as a break-in oil, and when i changed the 911 to Mobil-1 15-50 i did the first couple fo changes pretty close together, with new filters - on the theory that any new sludge they manage to dislodge should be got out quickly. Pennzoil/Castrol don't actually make anything - they're just repackagers. it's your engine, do what you want - but i bet you won't find many builders specifying them for their builds... |
ChrisReale |
Jun 3 2004, 01:44 PM
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#6
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Sleazy Group: Members Posts: 2,665 Joined: 20-January 03 From: San Francisco Member No.: 176 |
I broke my 914 engine in with Kendall 20-50 and switched to Mobil 1 15-50. My 1986 Subaru has 234,00 miles on it, and I have used castrol 10-30 at all times and the compression is still good and it dont burn oil at an unreasonable rate so...
Any modern oil will prolly be ok, just make sure it gets changed at the right times and the right ammount is in the engine at all times. |
Carrera916 |
Jun 3 2004, 01:53 PM
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#7
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Member Group: Members Posts: 292 Joined: 9-February 03 From: Pleasanton, CA Member No.: 273 |
For long time, I always use Castrol stuff....I guess I cant get away from these bean oil..Castrol R....gotta sniff these stuff for yourself someday...especially when stand behind the real 4 cammers....
I tend to use the petroleum based oil like Castrol till the engine breaks in then switch over to Amsoil synthetics... Old engines, yes, the synthetics will find it's way out but if you have replaced all seals which is pretty easy to do with TIV, then switch to synthetics, I pretty much never ran into leaking problems...that's if the sealing job are done right.... check the Amsoil website....real good stuff...been there first before any of these mega big oil corps and they're having hard time matching the Amsoil.... j |
Tom Perso |
Jun 3 2004, 02:04 PM
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#8
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Crazy from the Cold... Group: Members Posts: 647 Joined: 8-August 03 From: Kalamazoo, MI Member No.: 1,003 |
I use Shell Rotella T, 15W-40. It's Diesel oil so it's high in zinc for anti-scuffing.
Comes in 4 quart containers and it's easy to buy and do an oil change. As long as you keep the level up, change it often, and don't use Penzoil. Later, Tom |
Jake Raby |
Jun 3 2004, 08:32 PM
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#9
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
No luck with Mobil 1 in a TIV for me...
Royal Purple and Valvoline synthetics work well.. I stick with Kendall for conventional oil. |
ChrisReale |
Jun 3 2004, 08:43 PM
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#10
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Sleazy Group: Members Posts: 2,665 Joined: 20-January 03 From: San Francisco Member No.: 176 |
QUOTE(Jake Raby @ Jun 3 2004, 06:32 PM) No luck with Mobil 1 in a TIV for me... Jake, I have seen you say this many times. What concrete "evidence" do you have that shows other synths out-perform Mobil 1 in a Type 4? I am very curious. I know you practically have a dyno attached to your hip, what has it told you? (IMG:style_emoticons/default/beerchug.gif) |
Jake Raby |
Jun 3 2004, 09:13 PM
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#11
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
3 days of dyno work on the same engine, same load and same temps....
The Mobil 1 ran 30 degres HOTTER than the others. I never saw any HP gains between the 6 oils I tested. Some made the engine seem to rev faster, thats about it... I also tried the Mobil 1 in our FP car directly against a conventional oil and the conventional oil ran cooler! Same day, two differet sessions! |
reverie |
Jun 3 2004, 09:33 PM
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#12
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Senior Member Group: Members Posts: 783 Joined: 14-March 03 Member No.: 427 Region Association: None |
Thank you for posting that, Jake.
I have been told that synthetics don't absorb heat as well as conventional oils, and your data seems to verify that.. but your other data leaves me confused. In a typical air-cooled engine (where oil plays a role in engine cooling), does it make sense to use a good conventional oil for better cooling? |
Jake Raby |
Jun 3 2004, 09:43 PM
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#13
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
A few synthetics work well in these engines, but not all cases are the same..
What you were told was probably written when the only synthetic on the market was Amsoil- it sucks ass! I have ran Royal Purple in my 912E for 54,000 miles (thats 21 months of driving) and the oil thats in it now was last changed 8,000 miles ago... I change it when I see a puff of oil smoke between gear shifts- till then I just swap filters once a month or so.. My Bus has had the same oil in it for two years- its Valvoline Synthetic. Both these yield oil temps 2-30 degrees less than any conventional I have tried in these engines... Yes, I have been purposely abusing my cars for years- I try to break them. Risk and development baby! |
MarkV |
Jun 3 2004, 10:24 PM
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#14
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Fear the Jack Stands Group: Members Posts: 1,493 Joined: 15-January 03 From: Sunny Tucson, AZ Member No.: 154 Region Association: None |
May 2004 Exellence Magazine had an article on "Motor Oil for Older Porsches". Looks like the Porsche factory is recomending synthetic over conventional oil. Here is part of the article:
Deciding which motor oil is the "right one" is probably one of the most debated areas of automo-/e theory — and you'll get 100 answers for every 100 people you ask. )me enthusiasts stick with one brand r decades, others buy whatever's on lie, and many experiment with a imber of different oils until they find ie they like, whether it's because of ist, reduced engine temperatures, or ime less tangible benefit. Porsche owners have another 'enue: They can turn to the factory for Ivice. Since January of 2001, Porsche is filled all new cars with Mobil 1 OW-I synthetic motor oil. That's a pretty impelling recommendation for owners newer Porsches, but what oil should i used in older cars? This Tech Forum II explore the factory's recommenda- lions and offer some suggestions based on real-world experience. Conventional or Synthetic? Enthusiasts have been arguing over the advantages and disadvantages of synthetic motor oils ever since they came onto the market a few decades ago. Books have probably been writ-ten on the subject, but the Porsche line is simple: Synthetics are better. To quote Porsche's latest oil-related ser-vice bulletin, which covers all air- and water-cooled road cars from 1973-98, "Non-conventional basic oils have more favorable properties as com-pared to conventional oils." (Non-con-ventional refers to synthetic oils, con-ventional means mineral oils.) Not very strong words, but the company's actions speak much louder: Porsche no longer approves any conventional oil for any of these Porsches. Hard-core oil aficionados will already know that what is generically called "synthetic" motor oil is actually two distinct types: synthetic and hydrocrack. For the rest of us, what's the difference? Conventional motor oil is refined crude oil, pumped out of the ground and distilled for use in car engines. Synthetic motor oils are made from a conventional oil base but con-tain added synthetic hydrocarbon lubricants (such as polyalpaolefins) to improve low-temperature lubrication |
reverie |
Jun 3 2004, 10:27 PM
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#15
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Senior Member Group: Members Posts: 783 Joined: 14-March 03 Member No.: 427 Region Association: None |
Yes, Jake, that was many moons ago.. (IMG:style_emoticons/default/smile.gif)
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grantsfo |
Jun 3 2004, 11:32 PM
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#16
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Arrrrhhhh! Group: Members Posts: 4,327 Joined: 16-March 03 Member No.: 433 Region Association: None |
I ran a 1.7 170,000 miles on Castrol 20-50 and it was still running strong. Ran a 2.0 with Castrol 20-50 120,000 miles no problems. Running Castrol Syntex 20-50 in my 1.8 for the past 12,000 miles no problems.
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phantom914 |
Jun 4 2004, 09:16 AM
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#17
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non-914-owner non-club member Group: Benefactors Posts: 1,013 Joined: 24-February 04 From: Covina,CA(North ofWest Covina) Member No.: 1,708 |
OK Jake, stupid question:
Someone here said that they heard a long time ago that synthetics don't absorb heat as well. You said that Valvoline and Royal Purple yield lower oil temps. Wouldn't those two statements support eachother? I guess the real question is: do Valvoline and Royal Purple yield lower engine/head temperatures? Andrew (I warned you it was a stupid question) |
Jake Raby |
Jun 4 2004, 10:01 AM
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#18
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Some synthetics soak he up, but don't disspiate it well in our applications...
Not all synthetics are good. Valvoline and Royal Purple are by far the best for a Type IV. |
machina |
Jun 4 2004, 10:33 AM
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#19
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Advanced Member Group: Benefactors Posts: 2,030 Joined: 21-June 03 From: Miami Beach, FL Member No.: 848 |
so which RP for florida racing?
also, is swepco still the best in 901 tranny? dr |
MarkG |
Jun 4 2004, 03:53 PM
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#20
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Member Group: Members Posts: 314 Joined: 24-May 04 From: Colorado Springs Member No.: 2,102 |
Used 30w Kendall GT1 in my 911. I have seen 30W Castrol foam in air cooled VW engines when they are not run up to oprating temps for a reasonable amount of time, Kendall GT1 did not seem to have this problem.
Redline 10/40W in my Ferrari, but a lot of those folks also swore by Royal Purple... Redline in my 240Z, Saturn and Hyundai over the years too. |
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