octane
#1
Rotary Enthusiast
Thread Starter
octane
Has anyone noticed a difference between low and high octane gas in their N/A? I didn't think it made a difference (unless it detonates), but I talked to a friend who said his 83 RX-7 12a wouldn't even start on 85 octane, but would run great on 91. My car (89 GTUs), on the other hand, starts and runs fine on 85.
Is there a difference, and, if so, why?
Is there a difference, and, if so, why?
#3
Do a search. This question has been discussed hundreds of times on here, so you can find out all the info you want about it.
Basically...
Stock NA = lowest octane possible is best
Turbo = highest octane possible is best
Basically...
Stock NA = lowest octane possible is best
Turbo = highest octane possible is best
#6
Originally posted by Bridgeported
Basically...
Stock NA = lowest octane possible is best
Turbo = highest octane possible is best
Basically...
Stock NA = lowest octane possible is best
Turbo = highest octane possible is best
#7
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Location: Charlottesville, Virginia, USA
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Originally posted by dr0x
Mazda made the turbo ii to run on 87 also. There is no reason to use anything higher if you are close to stock.
Mazda made the turbo ii to run on 87 also. There is no reason to use anything higher if you are close to stock.
Also note that at high altitude the octane requirement is decreased. The Series 4 (86-88) RX-7 is rated for 87 octane, but your 85 octane will probably work just fine at high altitude. Some US gasoline manufacturers sell their gas as a higher octane rating (87 may be sold as 89 for example), but others keep the same rating, so this can get confusing.
Also note that the Series 5 (89-92) RX-7's are rated for 89 octane, and other countries use a different octane rating than the US, so be careful of what you read on the internet.
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Shainiac
Single Turbo RX-7's
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07-17-19 02:20 PM