What can and should you run in an M42?

[b*saint]

Always run premium or is 89 ok?

[dude8383]

91 as stated in the manual.

if its chipped im sure it should be 93..

[Stu]

If it doesn't have a chip and you drive on the highway a lot or don't go WOT/redline often, 89 is fine. Otherwise, 93 or whatever the premium is in your area

[b*saint]

94 on the Mass Pike. I love that stuff.

[AdironRider]

Id never buy gas on the highway just because they mark it up.

I wouldnt run anything under 91 personally, but you could get away with 89.

[M42Technik]

If you drive don't go WOT/redline often...

You're not getting anywhere. Put premium, and rock 6,800 all day.

[dude8383]

You're not getting anywhere. Put premium, and rock 6,800 all day.

i rock 7200 all day...sounds absolutely beautiful there.