Originally Posted by Scorpion
I know there are some motor heads around here in this forum. I now come to you for some wisdom about synthetic oil.
I have a 95 Toyota Tercel, 4 speed manual trans that I love dearly for its fuel economy, compactness when it comes to parking it downtown Denver and more less the whole Toyota reputation of being a great car. The car has about 127k miles and my plans are to keep this car until the whole thing desintegrates.
I use regular 10W30 by Castrol for engine oil. Lately, I have been thinking of switching to synthetic oil of the same brand and same weight. I am not sure if I should go to full synthetic or semi-synthetic. Would I be able to notice a "difference" once I switch? And if so, on what? For a car with this mileage, what is recommended to use for oil? 30 wt or heavier?
I am sure there will be more questions asked by the motor experts. I consider myself a weekend mechanic. Lately, the way new cars are built with all those computers on board are making my weekend mechanical ventures limited. Most require the hi-tech equipment most of us may not own.
Thanks in advance.
IME opinion I dont think you will notice any "difference" changing to a synthetic. At this point regular and constant oil changes are more important. You may prolong the life, but I have never seen a conclusive study to promote this in a high mileage vehicle, new vehicle different story.If anything changing at this point might frustrate you by increased oil leaks as other posters have stated.. I think its better to start using synthetic from the get go, than so far into the life of the vehicle, most of the wear/damage your engine will see has probably already occured.... Consult your owners manual for the correct weight oil for your vehicle, tho I suspect it takes a 5-30w and and not 10-30w. But the owners manual will clear up that....
All those computers make it fun... Heck I like them better now that they have those computers....