Originally Posted By: ericthepig
Hey Lexus, on a separate note, I just chged my PCV on my '98 Sienna (essentially same engine as yours I think) - pretty sure it's the first time to be chged in 160k mi. (bought the car at 62k, and the prev. maint. notes were just oil chges). Anyway, the prev. guy did 3-4k OCIs, I then did 80k on M1 (up to 9k OCIs), then a mix of Schaeffers and others in the last 20k - and... the PCV was still in great shape. Just a bit of moist deposits on the outside of the intake. Otherwise whistle dixie thru it.
Also, GC has a high HT/HS (making it A3) - which is indirectly prop. to mpg.
Also, I got my best mpg ever on my Sienna - of 26mpg on Schaeffers 15w40. However I only did one mpg reading on the Sch. - but I'd never seen the mpg anywhere near that before (lots of other readings on 5w30 at ~24mpg best case). Maybe they like a thicker oil - but I think they are more responsive with a thin oil - so ??
Yeah I think your engine is the same as mine,the best millage I ever got so far was 24mpg coming back from the Jersey Shore last year.We got 22 going down,and 24 coming back.(W/GC and premium fuel.)