Quote:
Originally Posted by digital rules
Yes, that is strange. Been using Mobil 1 0w-20 all winter in my 1ZZ-FE with no consumption issues. How many miles on your engine?
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It's a 2000 with 142k miles, pre-2003 engines all had oil consumption issues though (which leads to blown precats and blown oil rings, very common cause of death). I've only had 3 different batches of oil in there but the oil consumption rate seems to be highly variable, the current mix is being consumed at about 1 quart per 1500 miles which is "acceptable" according to Toyota. Looking through the service logs that the previous owner gave me, it's probably been worse before; He went through 2 post-cat O2 sensors in 2 years, and I had to change the O2 sensors again shortly after buying the car. Exhaust pipes and sensors were coated in a thick layer of soot. When I bought the car the sump was nearly dry, the engine having burned over 1 quart per 1000 miles for 3000 miles.
Since I drive slowly and don't go much over 3000rpm most of the time it doesn't burn too much oil, but you can see puffs of smoke coming out the exhaust when the engine is revved to 4000 or higher. Coincidentally, the O2 sensor died on the fastest highway trip I ever took (70mph avg at 3700rpm).