 What octane gas do you run?, Is higher always better ? Or just a waste of $$$ |
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| Michael N |
 Oct 27 2006, 08:19 PM
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Certifiable  Group: Members Posts: 1,430 Joined: 6-June 04 From: San Jose, Ca Member No.: 2,164 Region Association: Northern California  |
I was wondering what most drivers are using in their 914's. 87, 92, 100?
I have heard that in fuel injected cars running with a higher octane gas than they were designed to run at can be a waste of money since they are set up to run on a specific octane and any more is lost. I have a Passat and the manufacture states 92 octane. My truck uses 87 and the dealer said I can do damage by running 92 ( although I have no idea why). Please set me straight on my ignorance. (IMG:style_emoticons/default/sad.gif) |
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| Jake Raby |
Oct 28 2006, 06:54 PM
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
If its been running fine on 91, leave it as is. Higher octane fuel, as stated above requires more CR to burn or advanced timing. If you have carbs don't be suprised if you need larger jets because the fuel viscosity is actually higher.. MFI can act similarly due to its characteristics.
So many times I see guys go to the track, dump in higher octane and then the car GOES SLOWER!!!!!! If you don't want to retune a street engine won't make any more power on higher octane fuel if it lives well on pump gas normally.... BUT the engine will run a tad cooler.. If it runs fine keep your normal fuel in the tank... |
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Posts in this topic
Michael N What octane gas do you run? Oct 27 2006, 08:19 PM
rjames I always use 91 or better (as suggested on the sil... Oct 27 2006, 08:28 PM So.Cal.914 As high as available otherwise it runs like dodo. Oct 27 2006, 09:25 PM
mikerose QUOTE
Thorshammer Many of you know I work in the motorcycle industry... Oct 28 2006, 01:22 PM rjames QUOTE
Jake Raby Eric, That was an excellent post! Oct 28 2006, 03:27 PM Michael N Thanks for all the input.
I have been running 9... Oct 28 2006, 06:34 PM Michael N Thanks :D
Now off to do some :driving: :drivi... Oct 28 2006, 06:57 PM Crazyhippy If you put higher octane in.. turn up the boost to... Oct 28 2006, 07:06 PM Leo Imperial Erik,
What you posted is interesting. I do not wis... Oct 28 2006, 09:38 PM gfulcher Finding a sunoco with 94 octane ULTRA is like find... Oct 29 2006, 08:12 AM shelby/914 No test results, or reems of data, just that my li... Oct 29 2006, 08:53 AM effutuo101 How often do the tanks get tested? once a year? I ... Oct 29 2006, 03:54 PM Air_Cooled_Nut My $0.02...
Gas is LIGHTER than water. Erik,... Oct 29 2006, 04:04 PM swood finally....some much needed validation in my life.... Oct 29 2006, 04:35 PM RickS The owners manual recommends 92. I figured the en... Oct 29 2006, 10:57 PM Travis Neff In my stock injected 2.0 I ran regular (87 in AZ),... Oct 29 2006, 11:01 PM fitsbain Lower octain gas burns hotter and makes more power... Oct 30 2006, 09:38 AM D1A3 I run 87 on my stock 2.0 engine as recoemnded by P... Oct 30 2006, 10:16 AM Demick I think the thing to take away from all of this is... Oct 30 2006, 10:52 AM Jake Raby As I satated above a couple of times every engine ... Oct 30 2006, 12:26 PM Matt Meyer On a NEW engine with computer controlled timing an... Oct 30 2006, 12:54 PM |
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