amsoil in geo prism, how long

[jarmstrong]

i put amsoil asl 5w30 in my sister's 97 geo prism w/ 1.6 4 cyl. w/ the amsoil sdf filter. the engine had 40k on it. will god knows what type of oil was used before. it was a toyota certified used care..not that that means anything. it runs real good thought. how long should i keep it in for this first drain? originally i was just going to change the filter at 10k or 12k and do analysis. thanks for any help

 

[bythabay]

Run the oil for either 6 months or 6-7 thousand miles (whichever comes first). then change the oil & filter and go with the recommended intervals. Also, make sure you do a flush (preferably an amsoil flush, before you switch over on a vehicle with more than 20k )

 

[Patman]

I'm ultra conservative so if it were me I'd go between 5-8k on the first run, no more than this, and then do an oil analysis. On the second run then go maybe 12-15k if the analysis looked good. By the third interval you might find you can go longer, but I certainly wouldn't push it to the limit until the third interval, I would never try and push it too far on the first or second interval.

 

[Pablo]

Patman (heading for 10K posts, btw) speaks very logically. Follow his advice. Especially since you didn't do an AutoRx treatment, nor do you know the true history of the vehicle.

 

[slalom44]

Those Prizms have great engines. It's actually a Toyota engine and the car is almost identical to the Toyota Corolla. In fact, the Haynes repair manual doesn't differentiate the two. I have 196,000 miles on my '95 Corolla, and it's still running great. If you do regular oil changes, your sister will have that car for many years.