Tried regular gas, instead of premium |
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Tried regular gas, instead of premium |
Porschef |
Oct 15 2015, 12:18 PM
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#1
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How you doin' Group: Members Posts: 2,165 Joined: 7-September 10 From: LawnGuyland Member No.: 12,152 Region Association: North East States |
Filled my tank yesterday with good ol' regular gas at 2.17 a gallon, about 60 centavos less per than premium. Had about a quarter tank left of 93 when i filled it. Figgered I'd just drive it easier, as the TDI was off the road with an issue.
Well as the commute wore on I noticed that not only was there no pinging with the lower octane, but I noticed the head temps were almost 20 degrees cooler... I'm not smart enough to know if this was related, or just that I was driving it easier. However, by the time I was nearly home (just before getting rear ended) I was back to thrashing it. I would swear it even ran better... Is this possible? |
rhodyguy |
Oct 15 2015, 12:22 PM
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#2
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,081 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
Even switching to mid grade raised my idle. Must be the result of a more complete burn.
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EdwardBlume |
Oct 15 2015, 12:24 PM
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#3
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914 Wizard Group: Members Posts: 12,338 Joined: 2-January 03 From: SLO Member No.: 81 Region Association: Central California |
Not only possible, but possible. Test it on a full tank and report back...
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sb914 |
Oct 15 2015, 12:25 PM
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#4
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Surf Guru Group: Members Posts: 4,306 Joined: 25-November 12 From: Brookings,Oregon Member No.: 15,191 Region Association: Southern California |
Filled my tank yesterday with good ol' regular gas at 2. 17 a gallon, about 60 centavos less per than premium. Had about a quarter tank left of 93 when i filled it. Figgered I'd just drive it easier, as the TDI was off the road with an issue. Well as the commute wore on I noticed that not only was there no pinging with the lower octane, but I noticed the head temps were almost 20 degrees cooler... I'm not smart enough to know if this was related, or just that I was driving it easier. However, by the time I was nearly home (just before getting rear ended) I was back to thrashing it. I would swear it even ran better... Is this possible? Not sure, but here in ca,premium is 91 octane, I noticed your premium is 93. Whats your regular octane? |
Porschef |
Oct 15 2015, 12:36 PM
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#5
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How you doin' Group: Members Posts: 2,165 Joined: 7-September 10 From: LawnGuyland Member No.: 12,152 Region Association: North East States |
Regular is 87, mid grade 89. Sunoco is the only station that carries 91 as an additional grade.
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mepstein |
Oct 15 2015, 12:39 PM
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#6
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914-6 GT in waiting Group: Members Posts: 19,279 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
I've been told for years that regular is all we need for a stock engine. That's all I use on all my cars.
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bretth |
Oct 15 2015, 12:42 PM
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#7
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Senior Member Group: Members Posts: 899 Joined: 23-June 15 From: Central TX Member No.: 18,882 Region Association: Southwest Region |
Are you not running a stock motor? Would think stock motor is fine with regular. Low compression.
Brett |
Porschef |
Oct 15 2015, 12:47 PM
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#8
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How you doin' Group: Members Posts: 2,165 Joined: 7-September 10 From: LawnGuyland Member No.: 12,152 Region Association: North East States |
Mmmm, left out that little tidbit, it's a 2056, 9:1, 9550 cam, Ljet.
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ChrisFoley |
Oct 15 2015, 12:51 PM
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#9
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I am Tangerine Racing Group: Members Posts: 7,928 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
You should probably be using mid-grade at 9:1
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aircooledtechguy |
Oct 15 2015, 01:08 PM
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#10
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The Aircooledtech Guy Group: Members Posts: 1,966 Joined: 8-November 08 From: Anacortes, WA Member No.: 9,730 Region Association: Pacific Northwest |
I don't think I have ever sprang for Premium fuel for my 914. 87 is what she gets and is very happy with it. The low compression of these motors does not require mid or premium.
The suggested "91 RON" is the European measurement for octane and is equivalent to our regular 87. I ran my Squareback with regular for years with the 2056cc and never gave pings. The new motor though is another story. I tried mid grade with the last fill-up and she's not happy with me. Definitely a premium only engine; I already knew that, but I had to try it at least. (IMG:style_emoticons/default/driving.gif) |
Mark Henry |
Oct 15 2015, 04:02 PM
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#11
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
If you are running E10 regular it doesn't surprise me that it runs OK and cooler.
Ethanol is a cheap octane boost and burning it actually is cooler than gas, thus the cooler head temps. That's the good. The bad is it rots old fuel lines and carb diaphragms (any rubber bits), it attracts water (rusting tank bottoms), fuel mileage suffers slightly and it goes sour real fast. Do not store anything with E10 in it, even with fuel stabilizer. I use premium in my bug/914 because I set my engines CR to run on it and I use it in all my small engines, mainly because they are often stored for weeks with the same gas in it. Here premium is ethanol free. The wifes daily and my SUV, that get run all the time, I use regular E10. |
Porschef |
Oct 15 2015, 04:49 PM
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#12
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How you doin' Group: Members Posts: 2,165 Joined: 7-September 10 From: LawnGuyland Member No.: 12,152 Region Association: North East States |
Mark, all the fuels here on LI have 10% ethanol. No stations sell pure gas.
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DRPHIL914 |
Oct 15 2015, 08:38 PM
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#13
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Dr. Phil Group: Members Posts: 5,767 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States |
We have several stations here that sell pure gas, 87 nonethanol, purrrfect! It's 30 cents more than regular with ethanol , but still less that premium, which I have to put in the jag and the audi-tt.
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JamesM |
Oct 15 2015, 10:28 PM
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#14
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Senior Member Group: Members Posts: 1,900 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
Both of my d-jet 2.0Ls run slightly cooler on 87 than they do with premium.
Haven't tried to run my 1.7 or my 2056 on anything but 91+ due to them being higher compression. |
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