Using 91 fuel good or bad?
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1st Gear Member
Joined: Oct 2006
Posts: 129
From:
Using 91 fuel good or bad?
I fill up with 91 (supreme) and my fuel injectors seem to clog fast. I just got a tune up and for about 5 days my car ran like brand new, but then went back todriving like it did before tune up. What the F@%! I paid over $100 to get my car running fast and smooth for only 5 days? Im wondering if it may be the fuel im using.
4th Gear Member
Joined: Jan 2007
Posts: 2,376
RE: Using 91 fuel good or bad?
the 3800 calls for 87............. higher octaine is for motors with high comp. and can handle the higher octain. if you have a stock motor it is doing nothing for you and will run better on the 87 anyway. the motor cant burn the high oct fuel.
Newbie
Joined: Mar 2007
Posts: 6
RE: Using 91 fuel good or bad?
ORIGINAL: bluovlh8er
the 3800 calls for 87............. higher octaine is for motors with high comp. and can handle the higher octain. if you have a stock motor it is doing nothing for you and will run better on the 87 anyway. the motor cant burn the high oct fuel.
the 3800 calls for 87............. higher octaine is for motors with high comp. and can handle the higher octain. if you have a stock motor it is doing nothing for you and will run better on the 87 anyway. the motor cant burn the high oct fuel.
I got the 3800 engine and i've been using 91 (supreme) and GAS IS A *****! $3 a gallon for supreme... ima stick to 87 now. Thanks.
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Tech Droid
Joined: Aug 2005
Posts: 9,215
From: North East PA
RE: Using 91 fuel good or bad?
ORIGINAL: chevman00
I fill up with 91 (supreme) and my fuel injectors seem to clog fast. I just got a tune up and for about 5 days my car ran like brand new, but then went back todriving like it did before tune up. What the F@%! I paid over $100 to get my car running fast and smooth for only 5 days? Im wondering if it may be the fuel im using.
I fill up with 91 (supreme) and my fuel injectors seem to clog fast. I just got a tune up and for about 5 days my car ran like brand new, but then went back todriving like it did before tune up. What the F@%! I paid over $100 to get my car running fast and smooth for only 5 days? Im wondering if it may be the fuel im using.
4th Gear Member
Joined: Jan 2007
Posts: 2,376
RE: Using 91 fuel good or bad?
yes but you programed the timing to burn the higher/slower burning fuel.
i have a bone stock 3.8 and used the 93 stuff. trust me it ran much better on 87.
now a stock ss will run a lot better on 91 then 87. because thats what that motor calls for.
anyway pete correct me if im wrong. im no tech lol.
i have a bone stock 3.8 and used the 93 stuff. trust me it ran much better on 87.
now a stock ss will run a lot better on 91 then 87. because thats what that motor calls for.
anyway pete correct me if im wrong. im no tech lol.
1st Gear Member
Joined: Jan 2007
Posts: 194
From:
RE: Using 91 fuel good or bad?
what do you guys think about running 89 octane in a 3.4 ? as opposed to 87 ?? this gas station by me has regular 87 and plue 89 for the same price, should i still go with 87 to get better mpg... or?