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7-11 93 octane
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<blockquote data-quote="swampratt" data-source="post: 3318855" data-attributes="member: 15054"><p>Not all 91 or even 87 octane will perform the same ..You have to see for yourself and see if your car responds positively or negatively to the fuel.</p><p>Here is a little race reading.</p><p><a href="https://www.speed-talk.com/forum/viewtopic.php?t=33517" target="_blank">https://www.speed-talk.com/forum/viewtopic.php?t=33517</a></p><p> and more on specific gravity. But not enough.</p><p><a href="https://www.sunocoracefuels.com/tech-article/specific-gravity-matter" target="_blank">https://www.sunocoracefuels.com/tech-article/specific-gravity-matter</a></p><p></p><p>And another tid bit is the one we all probably know is that higher octane burns slower.</p><p>If your car absolutely does not need higher octane you can build up carbon deposits on top of the pistons because the fuel is not completely burned away.. some deposits are left behind.</p><p></p><p>1992 Ford Escort for one that a buddy had .. he always used 91 octane.</p><p>135,000 miles he came to my house with a rod knock.</p><p>I changed his oil for him as he could not get under it.. he brought 20-50 thinking it would quiet it.</p><p></p><p>OK I will go along,,, changed it and still knocking.. but did not respond like a rod or main knock.</p><p>I told him I bet this is a carbon knock.</p><p>Had it at Idle and revved up but high revs in park it went away. put a load on it and KNOCK.</p><p>2 cans of sea foam down the pcv hose and no more knock.</p><p></p><p>Buddy seen it all the time at the Ford dealer.. car comes in knocking .. first thing they do is BG system combustion chamber cleaner.</p><p></p><p>So in one hand high octane can be good and in another it can be bad.</p><p></p><p>Enjoy all that.</p><p>My 1995 corolla has high compression 210 psi cranking pressure but has been given 87 octane all it's life 332,000 miles.</p><p>And E10 on top of that.. yes it likes the E10.</p><p>I did replace a fuel pump at 250,000 and inside the tank was spotless.NO rust no varnish no water. 7-11 fuel 95% of the time.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3318855, member: 15054"] Not all 91 or even 87 octane will perform the same ..You have to see for yourself and see if your car responds positively or negatively to the fuel. Here is a little race reading. [URL]https://www.speed-talk.com/forum/viewtopic.php?t=33517[/URL] and more on specific gravity. But not enough. [URL]https://www.sunocoracefuels.com/tech-article/specific-gravity-matter[/URL] And another tid bit is the one we all probably know is that higher octane burns slower. If your car absolutely does not need higher octane you can build up carbon deposits on top of the pistons because the fuel is not completely burned away.. some deposits are left behind. 1992 Ford Escort for one that a buddy had .. he always used 91 octane. 135,000 miles he came to my house with a rod knock. I changed his oil for him as he could not get under it.. he brought 20-50 thinking it would quiet it. OK I will go along,,, changed it and still knocking.. but did not respond like a rod or main knock. I told him I bet this is a carbon knock. Had it at Idle and revved up but high revs in park it went away. put a load on it and KNOCK. 2 cans of sea foam down the pcv hose and no more knock. Buddy seen it all the time at the Ford dealer.. car comes in knocking .. first thing they do is BG system combustion chamber cleaner. So in one hand high octane can be good and in another it can be bad. Enjoy all that. My 1995 corolla has high compression 210 psi cranking pressure but has been given 87 octane all it's life 332,000 miles. And E10 on top of that.. yes it likes the E10. I did replace a fuel pump at 250,000 and inside the tank was spotless.NO rust no varnish no water. 7-11 fuel 95% of the time. [/QUOTE]
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