New to the Forum just bought my first GTP

[motoshrump]

Hey there,

Just drove home my first GTP today. It's a 2002 Titanium colored fully loaded model with 90000 miles on it. It's practically all original (except the brakes of course) and requiring a set of struts (the roads are rough here) a couple of wheel bearings and a left front fender.

I consider myself a backyard do it your-selfer which explains the project car.

My first question is in regards to engine oil. The car has had conventional oil all its life with the second owner ( I am the third) and I personally have had the best luck running Castrol GTX with early oil changes on all my vehicles. I also use Black Label WIX filters religiously on eveything

What would be best for the Supercharger? Stick with a good conventional oil or go synthetic? The engine is super quiet and the previous owner ran 5W30 in it. We have the same kind of climate as Massachusetts / Upstate New York so the lighter weight oil hasnt had a negative impact on the engine that I can see.

With 90.000 miles on it I figure I am safe to go through with a change in oil type.

Any suggestions out there?

Thanks in advance

[MizzBecca]

welcome =)

[colindunn]

Hey there,

Just drove home my first GTP today. It's a 2002 Titanium colored fully loaded model with 90000 miles on it. It's practically all original (except the brakes of course) and requiring a set of struts (the roads are rough here) a couple of wheel bearings and a left front fender.

I consider myself a backyard do it your-selfer which explains the project car.

My first question is in regards to engine oil. The car has had conventional oil all its life with the second owner ( I am the third) and I personally have had the best luck running Castrol GTX with early oil changes on all my vehicles. I also use Black Label WIX filters religiously on eveything

What would be best for the Supercharger? Stick with a good conventional oil or go synthetic? The engine is super quiet and the previous owner ran 5W30 in it. We have the same kind of climate as Massachusetts / Upstate New York so the lighter weight oil hasnt had a negative impact on the engine that I can see.

With 90.000 miles on it I figure I am safe to go through with a change in oil type.

Any suggestions out there?

Thanks in advance

okay, so oil for the engine or the supercharger? the supercharger has a special oil. the oil from the engine does not lubricate the s/c they are separate. im not sure if that helps or what you were asking exactly?

[motoshrump]

Okay, I am starting to understand how GM has built this engine. If the S/C has an independant oil supply then how often should it be changed and how do I go about doing so?

[colindunn]

some people go without ever changing it. not a good idea. in the gm manual it says to check it around 90,000 to see if its low and add some. i just completely changed mine. it will cost around 20 bucks. you can either order the oil online or pick it up from a gm dealer. i got my gtp with the same amount of miles and just changed the fluid. peace of mind. this might help.

Pontiac Grand Prix GTP Eaton M90 Supercharger Oil Change Picture Illustrated Guide

[minichopper6hp]

Technically you are supposed to change it every 30k

[windycitygtp]

welcome