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i'm pretty much assuming this is totally fine, but i have a 2004 wrx that calls for 5w30. i don't have any regular 5w30 on my shelf at the moment, but i do have amsoil euro 5w40. i also have amsoil xl 5w30. am i correct in assuming both of these are totally fine to use in my wrx?

looks like my buddy is just going to defer to the local expertise instead of the hold my beer party.

anyone here sandblasted a car before; how difficult is it? a friend is weighing the options between renting equipment or going to someone like a local sandblaster - https://www.kellysandblasting.com. it seems a potentially delicate process, but one you're less likely to make a mistake on when...

e85, 8(?) track days, lots of rain; don't have solo data but highest temp i recall seeing was 250+ - i'm sure it was all 265 or under. with the cooler newly installed, which is the oem one from a forester xt, which routes coolant through copper housing.

Originally Posted By: camperbob I have always based a 40 degree oil/coolant spread is what you shoot for. If your coolant hit a max of 185 but your oil was in the 250 range, the oil is doing more cooling than it should. IMO, id put an oil cooler on that engine, and atleast do a 0w40 at those...

thanks for the thoughts. what does become a problem? note i do not have any pressure data for the 0w20 that was near 280. also still curious if i should be changing oil more frequently because of e85? how often do you recommend changing oil that gets this hot, is there anything like an x many...

i wasn't sure to post this here or the racing forum, i went for this since my car is not a race car, just something i take to HPDEs. 2013 subaru brz. manual states 0w20 and recommends 5w30 for hard driving. ok fellas i have a bunch of data and pics. first up is autobahn full in august. i don't...