Iv herd people say it is and other people say its not... I have a 2000 gsr motor built for boost, JE pistons, eagle rods, 9:1 Comp ratio (bottom end build). The motor had 60k when it was built and now has prolly around 66k... Its making around 400whp as of now and its my daily driver in the summer time...

I do a lot of driving back and fourth to school putting a lot of miles on it each week. I keep up with my oil changes, changing it super frequently every 1k miles just to be safe cuz i drive so much. At times i put nearly 1000 miles on it a week at best...

Some people say as long as im not always boosting and romping on it everywhere i go i should be fine...Then other people tell me motors built for high comp or boost should not be either daily driven, or if they are daily driven then they should be very frequently because there really only good for 40k miles or so.

WHAT SHOULD I BELIEVE?? SHOULD I BE OK??

 

I had put about 20k on a motor that was "built" before selling it off and it's still kickin'. I think that the argument to be made for not daily driving a "built" motor is the fact that oem parts are made for performance as well as longevity, where aftermarket parts are primarily made for performance and tend to wear out faster. (i.e. forged pistons require more piston to wall clearance which can wear things out faster.) i woulnt worry about it, just keep maintaining and check things like your compression once in a while.

 

ive had a few built motors over the past few years (aftermarket sleeves,pistons, rods the whole deal).

they all saw between 9-15k miles before taking apart for one reason or another. the only thing that i noticed was that i wound up changing headgaskets about every 5-7k miles.

 

I appericate all your guys help, I did a leakdown and comp test before i put it away this year for the winter...comp was 165 across the board and leakdown test was perfect...however i wasn't the one who built the motor so i don't know if it was a "loose build" or not. I guess ill just drive it like you guys said and see how it goes...Im just a person that thinks too much and worry's alot. The cars my baby. lol. Also all my turbo parts are good brands i didnt really cheep out there. And i just rebuilt my turbo so i should be good to go...

Oh and what kind of oil do you guys think i should run? and how frequently should i change it? I usual don't run synthetic which is why i change it soo often. Plus it just makes me feel better and that its helping the motor out in the longrun...

P.S. The person who built my motor told me to stick with Valvoline conventional...so that is all iv been running in it...Iv still yet to find out why he told me this...

 

so would you maby advise changing the head gasket maby once every year then...i drive about 5k in a summer with the car. Oem headgasket should be fine right? Right now its got a tripple layerd gasket with about 5k on it. what do you think??

 

My motor has over 40k miles on it. It does have some piston slap on cold start up, but that's about it. Only thing I change is the timing belt every winter. There's nothing wrong with a high milage built motor as long as everything is in working condition. As for the headgasket, leave it alone unless it's blown.

Adriano