- Joined
- Dec 30, 2006
- Messages
- 29,558
Pennzoil GT 25W50.
Thickest weight oil you used
- Thread starter shell_user
- Start date
- Status
I ran Castrol GTX 20W-50 in my old 87 Mustang GT 5.0.
Mobil1 15w-50 in an m30 powered BMW 535i. She is a "garage queen" so cold starts aren't an issue. I will likely move back to xxw-40 for the next oil change.
Have used 20-50 several times.
20w50 in a 69 Dodge D-100, 57 chevy, 77 IH Scout, and I think in my 67 lemans.
it helped with some oil consumption issues.
at the time was under the impression that thicker was better except with the scout. That was to give it a ZDDP boost.
Got some 5w50 left over that I'll probably just dump in the jeep before I switch to defy.
it helped with some oil consumption issues.
at the time was under the impression that thicker was better except with the scout. That was to give it a ZDDP boost.
Got some 5w50 left over that I'll probably just dump in the jeep before I switch to defy.
Originally Posted By: SLCraig
10w30 I believe.
You rebel! I've gone about as far as 15w-40 and used a straight 30 once to my father's chagrin in some OPE.
10w30 I believe.
You rebel! I've gone about as far as 15w-40 and used a straight 30 once to my father's chagrin in some OPE.
Originally Posted By: randomhero439
20w-50 SuperTech in my 99' Neon R/T. Favorite car ive owned, didnt burn a drop of oil when i bought it. I seafoamed the intake manifold and gas a few months later, started burning oil. Would stall out on cold winter mornings with the 20w-50 before it came up to temp. 5w30 would burn a quart in 20 seconds at WOT.
...
So can we conclude from this that Seafoam causes oil burning in modded cars? LOL
10w40 in everything until the 90s.
20w-50 SuperTech in my 99' Neon R/T. Favorite car ive owned, didnt burn a drop of oil when i bought it. I seafoamed the intake manifold and gas a few months later, started burning oil. Would stall out on cold winter mornings with the 20w-50 before it came up to temp. 5w30 would burn a quart in 20 seconds at WOT.
...
So can we conclude from this that Seafoam causes oil burning in modded cars? LOL
10w40 in everything until the 90s.
Originally Posted By: weebl
Originally Posted By: atikovi
I don't get that chart. How can the 75W have the same viscosity as 5W or 10W? Doesn't make sense.
I used to think the same. Then on BITOG, I learned that the scales used for viscosity on gear/transmission oils are completely different than for engine oil.
Exactly. Iirc a 20w-50 engine oil is similar in viscosity to a 70w-140 gear oil. I might be mixed up though and its a 70w-90 gear oil that's similar.
Originally Posted By: atikovi
I don't get that chart. How can the 75W have the same viscosity as 5W or 10W? Doesn't make sense.
I used to think the same. Then on BITOG, I learned that the scales used for viscosity on gear/transmission oils are completely different than for engine oil.
Exactly. Iirc a 20w-50 engine oil is similar in viscosity to a 70w-140 gear oil. I might be mixed up though and its a 70w-90 gear oil that's similar.
Originally Posted By: Clevy
Originally Posted By: weebl
Originally Posted By: atikovi
I don't get that chart. How can the 75W have the same viscosity as 5W or 10W? Doesn't make sense.
I used to think the same. Then on BITOG, I learned that the scales used for viscosity on gear/transmission oils are completely different than for engine oil.
Exactly. Iirc a 20w-50 engine oil is similar in viscosity to a 70w-140 gear oil. I might be mixed up though and its a 70w-90 gear oil that's similar.
Most International Harvester owners run SAE 50 motor oil in the trans and transfer case.
Originally Posted By: weebl
Originally Posted By: atikovi
I don't get that chart. How can the 75W have the same viscosity as 5W or 10W? Doesn't make sense.
I used to think the same. Then on BITOG, I learned that the scales used for viscosity on gear/transmission oils are completely different than for engine oil.
Exactly. Iirc a 20w-50 engine oil is similar in viscosity to a 70w-140 gear oil. I might be mixed up though and its a 70w-90 gear oil that's similar.
Most International Harvester owners run SAE 50 motor oil in the trans and transfer case.
Nothing too fancy here, M1 15w50 in a 355 race engine.
Just watched a nitro team dump 70WT Red Line into the engine on TV.
Just watched a nitro team dump 70WT Red Line into the engine on TV.
This is not in a car. But I've used Aero Shell 15W50 on a Cessna 172 Lycoming O-320.
That stuff is pretty thick. During the winter months you have to preheat the oil/engine prior to start up or risk engine damage with low to non-existent oil pressure. The oil is a major part of cooling as it is air cooled.
Also one must avoid letting the engine sit for too long when doing a short stop. It's pretty hard to find a plug/heater in remote airports.
That stuff is pretty thick. During the winter months you have to preheat the oil/engine prior to start up or risk engine damage with low to non-existent oil pressure. The oil is a major part of cooling as it is air cooled.
Also one must avoid letting the engine sit for too long when doing a short stop. It's pretty hard to find a plug/heater in remote airports.
Using straight 30 wt. right now. No issues!
Straight 50 weight and two bottles of STP in an old Case model D tractor. Otherwise, it burns oil so quickly and creates such a cloud of smoke, you can hardly stay on the tractor.(With filter change, it's an eight quart system).
15w60 is what I am currently using in my '01 Magna (Diamante), having recently changed from 10w50. Jury is still out this one.
Some Mitsubishi dealers in Australia use 10w, some 15w, I've used 10w40/50 Synthetics up until my oil change today, so we'll see how the 15w performs -- I still may return to the 10w yet, if the fuel economy suffers.
Some Mitsubishi dealers in Australia use 10w, some 15w, I've used 10w40/50 Synthetics up until my oil change today, so we'll see how the 15w performs -- I still may return to the 10w yet, if the fuel economy suffers.
Last edited:
I put about a gallon of gear oil in the B2000 oil burner when I was [censored] off at it and out of top off oil... ran fine and nothing changed much.
Straight 70 motor oil in an old pan head.
- Status
Similar threads
- Locked
