A while back I wrote about "better MPG with thicker oil" on my 96 4cyl Saturn DOHC. Now I'm singing a different song.
Replaced the t-stat, as it was reading only around 1/4 most of the time, and did another Auto-Rx treatment (probably didn't need it as the engine is most likely squeaky clean from the previous Auto-Rx treatment about 30K ago and all the LC that's been used, but...)
Filled it up with Pennzoil 5w-20 Synthetic GF-4 after the A-Rx rinse cycle. Even though the bottle is labeled as "SL", it's probably SM if it meets the GF-4 spec, and an M1 filter. I'm wondering if it's PZ Platinum in the bottle??
Average MPG for the 5 tanks post A-Rx rinse is 37.5MPG. This includes a fair amount of A/C and sitting in traffic. I'm simply amazed! No 5-tank range has ever had numbers consistently this high. In the past, if ONLY highway miles were accumulated would this be possible, but now it's happening every tank!!
Too bad I didn't buy the 6 cases of this oil WalMart had for $1.50/qt. I only bought half a case.
[ October 06, 2005, 12:28 PM: Message edited by: ToyotaNSaturn ]