Hello
I have a 2000 Lexus RX300 with 310k miles.
The engine is the 1MZ-FE engine that is known for sludge and I bet I have a fair amount of sludge by now. I am afraid to pull the rear valve cover.
I switched to full synthetic about 4 years ago and run 5W30.
I consume about 1 quart every 500 miles. I have some small oil leaks (valve cover gaskets as well as crank or cam seals). But I think I am burning most of what I am consuming unless the oil loss is going to sludge buildup.
Should I stick with 5W30 or go up or down a grade. From a sludge point of view is thinner or thicker oil better?
I have a 2000 Lexus RX300 with 310k miles.
The engine is the 1MZ-FE engine that is known for sludge and I bet I have a fair amount of sludge by now. I am afraid to pull the rear valve cover.
I switched to full synthetic about 4 years ago and run 5W30.
I consume about 1 quart every 500 miles. I have some small oil leaks (valve cover gaskets as well as crank or cam seals). But I think I am burning most of what I am consuming unless the oil loss is going to sludge buildup.
Should I stick with 5W30 or go up or down a grade. From a sludge point of view is thinner or thicker oil better?