grayfox2 Posted January 18, 2009 Share Posted January 18, 2009 I've used 87 octane in my '95 Path since I got it, as did my dad since '97 when he got it. The dealer said it was cool, but I always thought 91 was the right octane. Am I cool with 87 or not? Link to comment Share on other sites More sharing options...
unccpathfinder Posted January 18, 2009 Share Posted January 18, 2009 yep...87 is all you need to run...now on my last trip out here i saw 86 and 88 which threw me for a loop so i ran the 88 being 400 or so miles still away from CA Link to comment Share on other sites More sharing options...
nige Posted January 18, 2009 Share Posted January 18, 2009 i have been using 87 in mine and don't notice a problems. If i am going on a long road trip (more than a tank) i will sometimes put in a tank of high test. I don't notice much of a difference in performance, but i do get a bit better mileage Link to comment Share on other sites More sharing options...
Slick Posted January 18, 2009 Share Posted January 18, 2009 the factory handbook actually says not to run anything over 87 octane.......... before i knew that i ran 89 and mini would ping...... run 87 and all happy again. the 91 octane can actually harm your engine over time if it wasn't built for that type of fuel in the first place (like a corvette/sports cars/yadda yadda) Link to comment Share on other sites More sharing options...
adamzan Posted January 18, 2009 Share Posted January 18, 2009 I run 89 and I find it gets better mileage here in Canada. Now that the price has gone up a bit I'll probably go back to 87 Link to comment Share on other sites More sharing options...
glenn Posted January 18, 2009 Share Posted January 18, 2009 The engine was designed for 87, so thats what you should run. Higher octane won't help unless you are willing to change the engine tuning by changing timing,cams etc.. Link to comment Share on other sites More sharing options...
MY1PATH Posted January 18, 2009 Share Posted January 18, 2009 (edited) with 15 deg spark timing (instead of 12) and headders I notice a benifit in mpg from running 91 octane. On my tirp to cali last week I got 18.5 mpg carrying 2 passengers, a dog, luggage, lots of holliay gifts for the family, 100lbs of snow & recovery chains, and full size spare on the back. I only used 91 the whole time. Normally I use 91 every other fill (I normally fill @ 1/4 tank) and get pretty decent mileage. the problem with using too hig octane is that it does not ignite as fast. Ideally when the spark hits it, it does not combust undill the downstroke has just started. too high octane and the "flame front" has to catch up to the piston before it can push it and in worst case not finish expanding before the piston starts going up again... Edited January 18, 2009 by MY1PATH Link to comment Share on other sites More sharing options...
Precise1 Posted January 19, 2009 Share Posted January 19, 2009 Stock? 87 octane, don't waste your $ on anything else... B Link to comment Share on other sites More sharing options...
GrimGreg Posted January 19, 2009 Share Posted January 19, 2009 Yeah, unless you have done something to change the compression ratio, then the cheap stuff is best. Link to comment Share on other sites More sharing options...
Slick Posted January 19, 2009 Share Posted January 19, 2009 oh, and timing is SUPPOSED to be at 15 degrees (i run both mine at 14 tho)....... if you had your timing at 12 degrees, and lived here in CA you'd fail a smog test. Link to comment Share on other sites More sharing options...
MY1PATH Posted January 19, 2009 Share Posted January 19, 2009 oh, and timing is SUPPOSED to be at 15 degrees (i run both mine at 14 tho)....... if you had your timing at 12 degrees, and lived here in CA you'd fail a smog test. the TBI engine specs call for 12 degrees and the MPFI calls for 15 degrees. Link to comment Share on other sites More sharing options...
grayfox2 Posted January 21, 2009 Author Share Posted January 21, 2009 Ok so I'm alright with 87. Cool beans. Stupid manual.... Link to comment Share on other sites More sharing options...
Slick Posted January 21, 2009 Share Posted January 21, 2009 the TBI engine specs call for 12 degrees and the MPFI calls for 15 degrees. wasn't payin attention hehe MY BAD! (thought it was an MPFi engine) Link to comment Share on other sites More sharing options...
Indigent Posted January 21, 2009 Share Posted January 21, 2009 There would be little reason for you to think otherwise slick! This is the 90-95 section. Just in case people forgot where they clicked. lol Link to comment Share on other sites More sharing options...
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