quick question. im debating about stickin with 93 oct. or goin with 110(sold at chevron 5mi from my house =). The car is going to be driven 2 or 3 times a week. autocross and track days as well. street port, t3/t4, wolf 3d 720cc 2ndaries yada yada. ive got a denso o2 sensor in it now. my question is, would the 110 hurt the o2?? if it is, wat o2 is recommended for higher octance gases. im getting the car tuned june 1st so i need to decide. 110 preferably hehe

 

as far as i know, octane rating doesnt change the life of an 02 sensor, runnning a leaded fuel will

i dont see any issues reunning the higher octane unleaded fuel.

 

i've never seen 110 unleaded. what brand does it go under?

 

According to my wideband install instructions, leaded fuel is a problem....................eventually, but they never mentioned octane. I forget exactly but something like 5000miles on leaded and it's junk. Octane is only a rating of resistance to detonation. There are many ways to do this. Lead additives are one way, and a bad way for o2 sensor life.

 

VP has Motorsport 109 unleaded.
I've tuned piston motors to 24-25psi with it. It's highly oxygenated so your regular tune-up will have to be tweaked.

 

i can get it at my local chevron....its a sunoco fuel. and it is 110unleaded. thanx for the help.

 

A local Marathon station advertises that they have "CITCO 110 UNLEADED RACE FUEL".

Never actually investigated that one.

 

I would say it depends what additives it has in it. I think LRP (lead replacement petrol) over here in the UK has potasium in it, not sure if that would affect the O2 sensor.