So I switched from Mobil 1 5w30 to Royal Purple 5w30 this time around. I have to say, I like it better so far. Butt-dyno says acceleration is a bit peppier and smoother, but you know how that goes. Still, it definitely seems much happier in the morning, in particular. A nice improvement for an extra $1/qt at Walmart.

Remember that you went from old Mobil 1 to new Royal Pruple. I bet if you switched back tomorrow, you'd feel the same difference. :cool:

But mostly the difference was in your head. :p

Watch for consumption. Many say the 5-30 RP is a bit thin and use the 10-30 instead.

More or less people than say that M1's current formula shears at high rpm and destroys motors?

I was running 15-50 M1 in my motor the last time it died. I don't think it was the oil, but why chance it. I'm planning on running RedLine in the car once the motor's broken in.

Also, 5-30 and 10-30 should be the same viscosity once up to temperature. The only difference is that the 5-30 oil is thinner at low temps.

Less?

OT but I never thought I'd see the day when a full tank of gas costs so much more than the a DIY synthetic oil change. :mad: It's not even a close anymore. I used fill up with 93 premium for like $12... 10 years ago.

Did you also have to walk 12 miles in the snow to get to school and it was uphill both ways and you had to put a cow on your head to keep warm?

And he also wore an onion on his belt, as was the style of the time.

Also:
http://themot.org/gallery/d/45773-2/gas_prices.jpg

I think it's better than fresh Mobil1 ever was. I'd never noticed an improvement quite as remarkable as this. It's not life-altering, just noteworthy. :P

D'you have five bees for a quarter?

I slotted the Fumoto Oil Valve last night. Next oil change, I'll take the tablespoon challenge again. :)

I should note that I don't care much for Mobil1 at all anymore. I have their synthetic in the transmission, the recommended 75w90, and I've hated it since day one. Next change, I'll either be going back to OEM or trying Redline.

Ew yah, don't run Mobil-1 in the tranny...way too slippery. OEM is actually quite good. I switched to Uncle Scotty's but I don't get what all the rave reviews are about. It feels almost identicle, except maybe I can down shift into 1st a little easier.

Yeah, most synthetic gear oils suck in Subarus. Go with 75w90NS or some Lightweight Shockproof next time. I would say "oem" except there really isn't such a thiing. Dealers just use the cheap bulk stuff as far as I know.

This is the closest I've found to OEM. 20L is a bit excessive, though. :lol: