candymanjl

I switched to full synthetic after about 7,000 miles. I used the same weight as stock, Walmart had it in stock and it's cheap there.

Lifter583

I run Amsoil and it goes for 10 k before a change...which is early for their recommendations...as for the discolor on the plugs...the factory did use a type of anti-seize and with carbon build up they do look very strange.

moosestang

Is this the rust you speak of?



It's not rust, it's combustion byproduct. Who knows what they are putting in this gas.

Swervin309

I bought the car brand spakin' new. Had 5 or 6 miles on it. Since then i've babied it. Oil change every 5k, cleaned the filter (K&N) ever 10k, check fluids frequently. I never really rode it hard until i moved to Atlanta.

Moosestang, that's exactly what it is. Combustion by-product? I'm going to assume that the combustion chamber looks similar. Is there any way to prevent this build-up? Is there a way to clean this crap short of pulling the heads?

Thanks for the oil advice. Pardon my inexperience with these newer engines. I had a 69 Stang coupe with a 351W that i knew inside and out. These aluminum/OHC/fuel injected/computer controlled jobs are new to me.

simplexdesign

What kind of gas do you run in the car?

Swervin309

Either Kroger or Quick Trip. I used Chevron for about 35k but in Atlanta Kroger and QT are cheaper. Cheaper more than likely being the problem.

moosestang

I use mostly BP or exxon. Seafoam can clean anything. I've been meaning to get a can and run it through the tank. You can also feed it directly into the intake through a vacuum hose.

Swervin309

I've heard of this stuff before. Got a buddy here that swears by it. There's a $h!t load of vids on YouTube of people using it. I'll give it a try. Thanks a mil.

candymanjl

E85 is in almost all fuels and it's very corrosive, eating fuel lines and ruining lots of parts. that's why the mustang's gas cap has a no E85 symbol on it. unfortunately we can't avoid it completely since it's in everything. not that I know for sure that's what's making the plugs look like that but that's my guess.

Swervin309

Makes sense. Every pump you see now-a-days has the "may contain up to 10% Ethanol" label. Why can't hippies leave my gas alone?