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