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Solution to oil dissappearing in 1ZZFE engine

518K views 629 replies 164 participants last post by  ferrari  
its also a major problem with the first 7a-fe's put in 93's and 94's

I bought mine to find out it was going through just under 1L / 1000km just under toyota's allowable limit so no warranty help there when i finally pulled the original engine at 212,000km it was going through a 1/4L a day piston to cylinder clearance was reasonable just out of spec right around the service limit but the rings had no cylinder tension and were hopelessly stuck in the ring grooves even after soaking in degreaser and all sorts of stuff still wouldn't come loose

best thing i found helped was using 10w-40 oil and experimenting to find the one with the least burn off and changing promptly every 5000km

I tried so many "old mechanic's tricks with no success"
-ATF in the oil
-ATF soak through the spark plugs
-Seafoam soak in the spark plugs
-diesel oil for the extra detergents
-engine oil flushes
-premium gas
-thin oil thick oil