Switch to 5w20

[docB]

Synthetic oil is the real deal. I worked on a circle track pit crew for a while. Some fellows running in a higher performance class ran Mobil 1 all the time, except break in. One race they were out front and lost oil pressure while leading with but a mile or so to go to the checkers. They ran a dry sumped small block chevy to 7500-8000 rpm.
After the win, they tore down the engine and everything look normal. The HP gains and protection are real.

My wife's vehicle has a GM 3400 V-6. It has a ECU drive maintence feature like the Yaris. I change the synthetic oil at its recommendation. I'm willing to bet it goes further than the standard oil. Nearly a year and 10k miles usually. It that light is OK for the general for warranty purposes, this will work.

I had a family member working on BMW and Mini. They have pretty long OCI because of the synthetic oil. All gasoline engines contaminat their own oil. Avoid short trips. Or else switch to CNG or LPG. They can go way longer between oil changes.
doc

I had my maintence light come on before 5k with the factory oil. I put a synth 5W-20 in. I can't wait to see when the car says to change it again.

[1stToyota]

Originally Posted by docB

Synthetic oil is the real deal. I worked on a circle track pit crew for a while. Some fellows running in a higher performance class ran Mobil 1 all the time, except break in. One race they were out front and lost oil pressure while leading with but a mile or so to go to the checkers. They ran a dry sumped small block chevy to 7500-8000 rpm.
After the win, they tore down the engine and everything look normal. The HP gains and protection are real.

My wife's vehicle has a GM 3400 V-6. It has a ECU drive maintence feature like the Yaris. I change the synthetic oil at its recommendation. I'm willing to bet it goes further than the standard oil. Nearly a year and 10k miles usually. It that light is OK for the general for warranty purposes, this will work.

I had a family member working on BMW and Mini. They have pretty long OCI because of the synthetic oil. All gasoline engines contaminat their own oil. Avoid short trips. Or else switch to CNG or LPG. They can go way longer between oil changes.
doc

I had my maintence light come on before 5k with the factory oil. I put a synth 5W-20 in. I can't wait to see when the car says to change it again.

Pretty sure it'll come on [flash] in 4,500 miles, then stay on at 5k...it's not smart enough to adjust to driving habits, it just comes on at a preset interval.