DO NOT RUN LEADED FUEL!! I learn this the hard way having to replace my sparkplugs. If you have 02 Sensors and Cats, it will destroy them. Also you need to have the right program!

I ran leaded fuel and I have no cats, but I have 02's. I lost 200hp the car ran horrible. Stick with high octane unleaded!

 

Don't do it!

 

Hi, Lead kills the o2s and plugs, I know for sure! I use sunoco 104 unleaded Same specific gravity as pump fuel. Vp is thinner then pump and will run a bit richer on as tune..... That could save your motor if you are using stock fuel system.
Hope this helps, Tim

 

I use VP MS 109. Runs better than the MS 103 and cost a little more (motor octane is slightly higher). PM me your number and I can tell you who sells it for the cheapest price in OC. I buy it in 5 gallon cans and use the VP pump I purchased off there web site. Now I beat up on my friends LP640, 997TT and 650HP Gallardo.

 

Did you ever rerun Kevin's HPF M3 with your car running better?

 

Just filled mine with VP 105 unleaded...man that sh*t smells really good and the car is lovin' it.