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Author Topic: Octane Rating Usage Back to Topics
roadkingfl

All-Star Author
Orange County

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Message Posted: Dec 6, 2013 8:28:05 PM

If your vehicle calls for 91 Octane do you use 89 instead?
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roadkingfl
All-Star Author Orange County

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Message Posted: Dec 11, 2013 8:44:59 AM

My entire working career has been in the automotive industry...we own a 2004 Chrysler PT Cruiser GT 2.4 liter high output which according to the manufacturer it requires 91 octane...I've been running it with 89 octane since the very beginning with no sacrifice in performance or MPG, and, NO PING under hard acceleration.....bottom line, as some of you have said...try it, if your engine pings then stick to 91 octane. I know this will cause a flurry of opinions but that's just life :)
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Dennis783
Champion Author Des Moines

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Message Posted: Dec 9, 2013 8:05:25 AM

always use what the mfg recommends
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buddy_maynard
Sophomore Author Cincinnati

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Message Posted: Dec 8, 2013 5:14:25 PM

No. I always use the required rating
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maxstar
Champion Author Chicago

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Message Posted: Dec 8, 2013 1:27:36 PM

You are right MertieMan, I typed the wrong value. Most cars require "regular" which is 87 octane.
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bluenvoy
Champion Author Nashville

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Message Posted: Dec 8, 2013 12:02:17 PM

Only if you are stupid, would you use less octane than the owners manual says to use. Ping.
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forresj
Champion Author Wilmington

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Message Posted: Dec 8, 2013 11:16:19 AM

You can try 87 octane but if your vehicle experiences engine knock, I would revert to using what's recommended. Some luxury vehicles are capable of adjusting their timing to account for the differences in octane. But most vehicles do not have this technology.

[Edited by: forresj at 12/8/2013 11:15:45 AM EST]
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Floridaman2013
Champion Author Florida

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Message Posted: Dec 8, 2013 9:12:57 AM

Wouldn't buy a vehicle that needs premium, that is a waste of my hard earned money.
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blaman
Champion Author Phoenix

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Message Posted: Dec 8, 2013 9:09:55 AM

Whatever the vehicle manufacturer recommends.
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Maxer105
Champion Author New Jersey

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Message Posted: Dec 8, 2013 9:02:20 AM

87
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MertieMan
Champion Author Lexington

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Message Posted: Dec 8, 2013 8:51:54 AM

Maxstar; I think you are wrong in your statement as most vehicles on the road currently don't call for 89 octane, 87 instead. Some cars call for premium like BMW.
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weddy11
Champion Author Phoenix

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Message Posted: Dec 8, 2013 8:09:34 AM

87
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cv
Champion Author Raleigh

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Message Posted: Dec 7, 2013 6:35:26 AM

I would probably go with premium 93 if the car manual called for 91 octane.
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Bus936
Champion Author Lexington

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Message Posted: Dec 7, 2013 12:26:34 AM

I use 87 octane only since that is what my car and truck call for in the manual.
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minookaband
Champion Author Illinois

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Message Posted: Dec 6, 2013 11:59:11 PM

i use the octane called for by my vehicle - 87
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maxstar
Champion Author Chicago

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Message Posted: Dec 6, 2013 9:03:19 PM

Use the octane called for by the manufacturer. Most vehicles use 89 but check your owners manual or ask the dealer.
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