Quote:
Originally Posted by sperry
0w50 isn't going to be any different than 0w30 in the winter. The 0w means both oils are the same when cold. Going with a 0w over a 5w isn't that big of a deal IMO, in the winter or even year around.
But 50 is the hot temp viscosity, which is pretty thick. If you're not really punishing the car (at the track for example) I'm not sure there's much benefit to running a 50 weight oil. I think most people do fine with a 30 weight... but you've got a pretty built motor, so you might benefit from the heavier oil.
For example, I was running 15w50 in my track car just to help protect the motor a little more when hitting crazy high temps at the track (270F). Unfortunately, that was back when I was still running Mobile 1 before we realized the formula had been changed. Even with the thicker oil I spun a rod bearing on that stuff... then again I also really ran the car too hot. So who knows if it was the oil that failed and caused the heat, or the heat that caused the oil to fail. Either way, no more M1 for me.
Currently I run RedLine 5w30 in my WRX track car, Royal Purple 10w30 in our outbacks, and Rotella T6 in the Miata, and Delo 400 in the Diesel truck. I may go with something a little lighter in the outbacks for the winter, like a 5w30 or 0w30, but so far I've been able to go long miles between oil changes without burning oil in the turbo outback, which is something of a miracle. I'm at about 8,500 miles since my last change (I know, I know, I need to change it!) and I'm down less than a quart. Not bad for a turbo Subaru, so I may stick with the heavier oil.
I don't know anything about Eneos oils, but I would assume that the weight selection logic will be similar.
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again, thanks for the response.
I failed to mention this when I was listing my specs but I do have a EJ257 and STI trans swapped into my wrx. anyways, as I mentioned on the post above, all I do is some spirited driving in the weekends and other wise I'm mostly doing regular stuff such as commuting and grocery shopping.
but when I go out to cruises, I do let the turbo fully spool to 21PSI here and there(of course after the engine/oil is warm etc etc). otherwise boost load is kept between under vacuum to about 5-8PSI so I may just be freaking out over something so minuscule
on the side note, my center diff and the trans seems to like the shock proof gear oil so i don't plan on changing it for a while. As far as the rear diff is concerned, I have a Quaife LSD in there and Perrin Diff Cover. I see some gear oil getting vented out from the top when i do an occasional spirited driving around the mountains for long period of time (about two rounds of Mt. Rose Hwy or the road to Virginia City I know Im weird... I just like driving there by myself occasionally ).
tbh im not too concerned about this since i checked the levels when I first noticed it and few more times after and it was nothing really to be concerned with.
I really appreciate your input on this. It sucks that I have to have my WRX pull double duty as far as daily driving and spirited weekend drives. I wish I have a beater Corolla or something. unfortunately being a recent College Graduate, that is not a luxury I can afford. But my dad has told me before picking this car up, Subaru Imprezas are very versatile vehicles and I really wanna do everything i can to keep her on the road as long as possible while enjoying what the car can offer as far as performance and versatility
-Michio