3rd owner gas question??
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From: New Jeruz
3rd owner gas question??
Just bought a used 91EX 5 speed with 225k on it. 2nd owner had 11 years and used 93 octane since 99k. Should I use the if it ain't broke don't fix it approach and continue using 93 as the car runs DAMN well or ween it off by using 89 octane before going to regular 87 octane?
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From: Texas
imo I would switch to 87 since the engine was designed for it. Don't know what that 2nd owner was thinking :eh:
You could play it safe and use your 93 -> 89 -> 87 approach. Or go straight to 87 and see how the engine handles it and hope for no hesitation of some sorts. The ECU should adapt.
edit: The same case for my F4i. Previous owner used 93. Manual says 87. Switched to 87 and things have been just fine.
You could play it safe and use your 93 -> 89 -> 87 approach. Or go straight to 87 and see how the engine handles it and hope for no hesitation of some sorts. The ECU should adapt.
edit: The same case for my F4i. Previous owner used 93. Manual says 87. Switched to 87 and things have been just fine.
Last edited by Cyclonus; Apr 14, 2008 at 08:50 AM.
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From: glass case of emotion
you're reallllly not supposed to use 93 on anything that doesn't require it.
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random copy paste ...
The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.
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From: New Jeruz
That's what I thought. Anyhow I put in 10 bucks unleaded as close to empty as I cared to get as I just got the car and err'thing seemed fine except I noticed a little rougher idle at stops without clutch engaged and check engine light came on once. Also the battery light flashed once when stopped at a light. Drove all of it out and just put in 10 bucks of 89 to see how it handles that...
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From: New Jeruz
imo I would switch to 87 since the engine was designed for it. Don't know what that 2nd owner was thinking :eh:
You could play it safe and use your 93 -> 89 -> 87 approach. Or go straight to 87 and see how the engine handles it and hope for no hesitation of some sorts. The ECU should adapt.
edit: The same case for my F4i. Previous owner used 93. Manual says 87. Switched to 87 and things have been just fine.
You could play it safe and use your 93 -> 89 -> 87 approach. Or go straight to 87 and see how the engine handles it and hope for no hesitation of some sorts. The ECU should adapt.
edit: The same case for my F4i. Previous owner used 93. Manual says 87. Switched to 87 and things have been just fine.
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Joined: Apr 2008
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From: New Jeruz
That's what I thought. Anyhow I put in 10 bucks unleaded as close to empty as I cared to get as I just got the car and err'thing seemed fine except I noticed a little rougher idle at stops without clutch engaged and check engine light came on once. Also the battery light flashed once when stopped at a light. Drove all of it out and just put in 10 bucks of 89 to see how it handles that...
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From: New Jeruz
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From: New Jeruz