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Old 06-29-2010, 02:00 PM   #16
StikiGreenZ
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Quote:
Originally Posted by HavocSteve View Post
I use 87 in my E30, but I run 91 every 3rd tank just to get the junk out. My engine light always comes on Should I run 89 always instead of the 87?
What does your gas cap or manual say?
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Old 06-29-2010, 02:03 PM   #17
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Originally Posted by StikiGreenZ View Post
What does your gas cap or manual say?
Says to use premium but premium back in 1987 was 87octane. That's why I run every 3rd tank 91octane just to be a little bit nicer to the engine
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Old 06-29-2010, 03:00 PM   #18
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I've never seen a car have a CEL come on (yes even BMW's) due to using lower grade octane fuel.

Doesn't make any sense. The slight knock that the engine will see will be pulled back by the ECU.

Now if you have misfires then the CEL will flash and then stay on. But that's a completely different story. The timing retard is completely passive from an owners standpoint. I'm willing to bet that if you scan the car you're looking at OP that it will have a code for something else.
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Old 06-29-2010, 06:38 PM   #19
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Originally Posted by HavocSteve View Post
Says to use premium but premium back in 1987 was 87octane. That's why I run every 3rd tank 91octane just to be a little bit nicer to the engine
What are you saying? If you are saying that premium fuel was 87 octane in 1987, you are mistaken. Where did you get that idea?

P.S. 500 posts in your first two months should make you realise that most of your posts are noise. Someone has to break it to you.
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Old 06-29-2010, 06:43 PM   #20
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Originally Posted by MarkD View Post
What are you saying? If you are saying that premium fuel was 87 octane in 1987, you are mistaken. Where did you get that idea?

P.S. 500 posts in your first two months should make you realise that most of your posts are noise. Someone has to break it to you.
I'm glad it was you.

Anyway, as previously mentioned, if this guy is too cheap/broke to use the fuel the car needs, then I wouldn't even begin to wonder about what else he didn't do.
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Old 06-29-2010, 07:32 PM   #21
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Originally Posted by NOTORIOUS VR View Post
I've never seen a car have a CEL come on (yes even BMW's) due to using lower grade octane fuel.

Doesn't make any sense. The slight knock that the engine will see will be pulled back by the ECU.

Now if you have misfires then the CEL will flash and then stay on. But that's a completely different story. The timing retard is completely passive from an owners standpoint. I'm willing to bet that if you scan the car you're looking at OP that it will have a code for something else.
I agree on this
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