QUICK HELP- Oil question, is it ok....?? Options

[Silver94CelicaOw...]

Ok guys, quick question.....is it ok if im running 5w-30 grade oil in my 5s-fe?? After i already changed my oil today to 5w-30 i realized that the oil cap and owners manual both said to use 10w-30....so my question is, is it perfectly safe to run the new 5w-30 in my engine in this summer heat, or should i change it back to 10w-30?? The owners manual sounds like the 5w-30 is meant for colder operating temps, and i dont wanna screw my engine up by runnng a thinner oil.....but at the same time i dont wanna drain the oil back out if its fine to use it. SOMEONE HELP ME OUT!!

[Guest_Matthew_*]

yea i would say 10w-30 as well

but if you are running more power i would recommend Mobil One 20W-50

its good stuff


you can change it every 6000 miles instead of 3000 and it will be just as good as non synthetic for double the amount of time


one thing though its like $5/quart