M20 Octane question

[digger]

If you love your car, switch to regular 87. Excess octane will soak the carbon deposits inside any engine and lead to detonation or even pre-ignition.

From http://www.chevron.com/products/prod...rgas/8_q-a/#11

1. What octane gasoline should I use in my vehicle?
For starters, use a gasoline with the AKI or RON recommended by your owner's manual. (A rule of thumb is that the RON of a gasoline equals the AKI + 5.) Using gasoline with an antiknock rating higher than that required to prevent knock will not improve a vehicle's performance, including its power, unless the vehicle is equipped with a knock sensor (see below).

(Bold added by me)

M20's nor M10's have knock sensors.

Luke

Do chevron sell higher than 87?

You don't need a knock sensor. All you need is to get it tuned for the fuel you will be using.

But if you don't have a knock sensor you must always use this same quality fuel, becasue the ECU won't know there is lower octane fuel in it if you happen to put it in the tank.