Gas question??

[jon4pres]

I recently found a manual for the engine in my 1982 sn2001 and noticed I am supposed to use 93 octane leaded gas. Should I be using some kind of additive or am I ok running 89 octane unleaded gas?

[Bob's2001]

RE: Gas question??

I have an 83 and run 87 octane unleaded with no problems. On the valve cover of my engine it recommends leaded but I don't recall anything about high octane. It won't hurt anything to run a lead substitute.

Bob
83 SN 2001
Monster tower

[83sn2001]

RE: Gas question??

Ditto on my 83.The valve cover says 87-93 leaded but unleaded is supposed to have an additive to cushion the valves. If you don't trust it then you can run a lead additive. I have no problems with the 87 octane.I used to run premium but started cutting costs and have had no problems even when running fat sacks.

[CHassmann]

RE: Gas question??

I've always use 89 octane. Anybody have any experience with 87 in a GT40?

[Rick]

RE: Gas question??

I bought a team boat with 1200 hours on it with a GT-40 They tell me that all they ran was 87. It runs great I have continued to use 87 for the 130 hours I have on it since I got it