Originally Posted By: KrisZ
Originally Posted By: subaruguy12
Originally Posted By: bluesubie
This looks familiar.
Is this a built engine? I'm nearly thinking 15W-50 might work well, depending on your mods. Or maybe get Terry Dyson's opinion. Is it 360 whp (i.e. +100 hp over stock?)?
-Dennis
yes dennis, you told me to post here so i did..lol engine is stock, with 19k on it. you dont think a 15-50 is too much for the oil pump? as for mods its pretty much every bolt on and tuned on e85. this car stock dynoed about 220, its its a little more than 100 over stock. i have no issues putting in a built motor i was planning on it eventually at these power levels.
This is probably your problem, i.e. all sorts of bolt ons on stock internals. I don't see any oil helping this situation.
You either pony up the cash up front and do it right, or pony up the cash later when the block has an extra cooling hole on its side. Oil choice will only affect
when, not if.
And this is why it's a good idea to pay for recommendations from someone like Dyson. He will help get the the root of the problem and has a lot of experience with modified Subaru's.
15W-50 MIGHT be too thick, but keep in mind that the pre-2011 EJ engines allowed 50 grades in severe conditions. There's actually a uoa here from a stock Legacy GT on M1 15W-50 from several years ago (use google to search for it). He did admit to some drag in cooler weather, but you're well beyond stock.
M1 actually recommended M1 Turbo Diesel Truck 5W-40, in an application originally specced for 5W-20, on their Ask Mobil site.
Does your tuner recommend RT6? I wonder if the high calcium in M1 0W-40 would do better in combatting the effect of E85? You do need to do something though!
-Dennis