Quote:
Originally Posted by NicKey
If you are that concerned about the MFG warranty, then I wouldn't use any fuel or fuel additives which might tend to void it. You car is designed to run on 91 via the low octane table. Running your car hard on 91 in 105 ambient could hurt your engine and at best it will be down a bunch of power.
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About the best you can do without taking a chance on violating the warranty is to use Top Tier gasolines, which many auto manufacturers recommend:
https://www.toptiergas.com.