what grade gasoline

[Teamfour]

93 here. My Ecoboost has a 93 octane tow tune. It does make a difference.

[beerjay]

Originally Posted by f1100turbo

This is false.

The computer adjusts according to "engine knock" to give the proper air fuel ratio and timing.
There "not set" to a pre determined octane ratio.
This is just silly.

TURBS

Sabre owners united!

Engine knock is not the issue. Whether higher octane has any overall benefit is.
Some small cars need higher octane and say so in the owners manual, otherwise per the industry use regular gas and all is still ok and cheaper.
RTFM:

US Gov site on octane.

CBC Marketplace test on fuel.

[John4th]

Yea, you try to run lower octane in a vehicle designed for 91, it will knock/rattle/not be happy.

[Dennis and Julie]

Originally Posted by JohnIII

Yea, you try to run lower octane in a vehicle designed for 91, it will knock/rattle/not be happy.

X2. That's how my pick up is. It doesn't even run well with 91 that has ethanol in it.

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