What Brand of oil does everyone use on their P80 Volvo.

[RigsPGT]

NAPA Synthetic (made by Valvoline).
Winter : 5W30
Summer: 15W50 (to reduce oil consumption)

You must be a Napa insider Every few months they have it on sale and I get three cases. Once done, I get whatever I can find on full synthetic. Never get Wally World oil, I've had 4 cars misbehave after an oil change and had to switch to oil from auto parts store.

[s10lowrider1994]

I use Rotella t6 5w40, 300k miles and counting.

[101]

Mobil 1 10W30 high mileage year round with a Volvo or Mann filter on a 5000 mile interval.

[tryingbe]

Amsoil is a wondrous, glorious oil I've heard.

Now is the result after 6000 miles.

[oragex]

I used Pennzoil platinum, got black pretty quickly. Put Castrol Edge 0W30, got black.
Put Castrol Edge 0W40 got darker but still clear: being an average consumer, it makes me think it's better But in any case, the 40 number is better for engines that see more action

[sleddriver]

M1 10w-30HM. HTHS = 3.5 cS; A good, thick 30 that works well in older, turbo motors. Replaced every 8kmi with a filter change at 4k.

[Matty Moo]

I've been using the 10/30 super tech for a few years in all three. I also use the same 10/30 in my 22hp and 15hp pressure washers. Those get run hard and I haven't had any burning or other issues with it.

Matty Moo, you notice any difference since you made the switch to SuperTech? Those six/seven dollars... Almost a decent six-pack if you ask me. I'm due for an oil change towards the end of the month, maybe I should give it a try.

Nope. I change it every 3000 miles, none of those three see more than 10k/year.

I run that same stuff in my equipment, it gets run hard sometimes up to 10 hours/day. No issues, I just change it according to schedule.

[rspi]

10W-40 Mobile 1 HM, Use to change every 8k, now every 10k. Burn about 1 quart every 2,000 miles due to bad valve stem seals.

Volvo 850 T-5R Oil lab results

[hausmeister]

I always use Castrol 0w40.

[bmdubya1198]

I'm currently running Penzoil Platinum HM 10w30 Full Synth. It's been good, not much lifter noise or anything out of the ordinary. Before this I was running Valvoline 10w30 Synth. Again, about average. No matter what, if the car has been sitting for a day I will get lifter noise on a cold start. I haven't noticed very much consumption with either oil.