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I have not seen any vehicles using full synthetic oil have leaks. I have seen many vehicles using conventional oil have severe leakage.
It's not generally a case with vehicles that have always had synthetic. On older cars with higher mileage that normally used conventional oil, switching to synthetic can lead to leaks through various seals.
I have never used synthetic and never will..I like conventional oils...
Also I have to laugh when people get all freaked out about what weight oil is put in their vehicle.. UNLESS you put it in yourself, you never know what is put in your vehicle... Although the person who put it in might say it is 5w-20 it could in fact be 10w-30... AND unless your car starts really having problems, you would never know...
So while the weight of an oil is beneficial to vehicles, the mere fact of changing the oil regularly is more beneficial....
Also you need to use oil for what area of the country you are in (as in what type of weather goes on there)...
ex: If you live in Maine you may want to use a 5w-20 since you actually have winter...BUT if you live in Phoenix you may want to use a 20w-40 or 50 since there is no such thing as winter there...
//EDIT: ~90k miles and i live in TX so hot weather
Your car will be fine.
As far as some of the other comments in this thread, you can still buy Group IV oils.
All of Mobil 1's European formulations are Group IV, because to be labeled synthetic in Europe requires the base stock to be Group IV. No exceptions.
Their American formulations are now using Group III, as someone else said earlier. I have no idea about what other brands are doing now, except to say that Amsoil doesn't actually make their own base stocks... They bought from other manufacturers when they were touting using a Group IV base, which was either ExxonMobil or Chevron. Both continue to make Group IV oil stocks.
It's not generally a case with vehicles that have always had synthetic. On older cars with higher mileage that normally used conventional oil, switching to synthetic can lead to leaks through various seals.
But it's not the oil that's the problem, it's just exposing old dried out seals that were getting ready to leak anyways.
gotta love how a yes or no question/topic turned into a huge engine oil debate lol
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lol
