Anyone using Mobil 1 Truck and SUV in a Hemi? The spec'd oil is 5w30, but I was wondering if anyone's made the jump to using 5W-40. What do people think?
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Mobil TSUV 5W-40 for Hemi?
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In response to a post of mine, TS recommended Amsoil S3000 5w30 for an extended-drain w/bypass filter setup over the 5W-40s. I'm still a little conflicted, though- I've decided to stay with my Schaeffer's 5W/10W-30 (depending on season) and no bypass for now, but the 5W-xx HDEOs are still very appealing to me. I'd be interested to hear how it performs if you give it a shot.
I am actually running GC in my 5.7 Hemi this go around and think it is running the smoothest and quietest it has ever been. The new Hemi's call for 5w20 so I don't know which way to go. I should have a used oil analysis on the GC sometime in Sept.
The 5W-20 is specified due to the new cylinder shutdown system..can't think of the correct name the D/C uses...the oil has to be on the thin side to make this system work properly.
Ugh- DC is going to screw this engine up yet. As if the cylinder-shutdown system itself wasn't bad enough (it was a dumb idea 25 years ago when GM tried it, and it's even dumber now), it forces people to use those dang water-oils to boot.
G.M.had a few ideas that weren't tested enough before the public used them ie., diesels in cars and the electronic 4-6-8 Cadillac engine in 80's era vehicles,but engineering does move along and the new D/C set-up seems to work well.As for 20W oils not protecting engines...lets not go there
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I personally think 5W-20 for a high-output V8 is just too thin.
This isn't a high output V8. It has no more hp than virtually all NA non-VVT engines (as one member pointed out). You're looking at about 60hp/liter. Plenty of engines have this hp density.
My personal opinion is that you can use just about any visc you want on the high end unless you've got climate issues. It is however a waste of hp to churn heavier than needed oil during the warm up phase of your drive cycle (about 80% of the time most are driving). So, other than economy, I don't see a reason to automatically go with a lighter oil. It's a matter of effiency more than anything else. The rest, IMHO, falls into insignificant levels of differences.
This isn't a high output V8. It has no more hp than virtually all NA non-VVT engines (as one member pointed out). You're looking at about 60hp/liter. Plenty of engines have this hp density.
My personal opinion is that you can use just about any visc you want on the high end unless you've got climate issues. It is however a waste of hp to churn heavier than needed oil during the warm up phase of your drive cycle (about 80% of the time most are driving). So, other than economy, I don't see a reason to automatically go with a lighter oil. It's a matter of effiency more than anything else. The rest, IMHO, falls into insignificant levels of differences.
These noises are really unexplainable. I had the Hemi and with the factory fill and Amsoil 0w30 ran very smooth. ZERO noise even in the winter months. I think a solid 30wt oil is the way to go. Try the M1 SUV and take Gary's advice. If it doesn't slow the engine down or make it sluggish, stick with it. It's a very good oil. The Amsoil 5w-40 would be good also.
Well, I'm not going to pour 5W-20 in; I end up getting lifter noise during warmup with my hemi, and 10w30 RP made it go away. {Quote}
If the RP 10W30 is working fine, look no further. You may have found the holy grail for your particular engine.
[ July 30, 2005, 06:43 PM: Message edited by: 59 Vetteman ]
If the RP 10W30 is working fine, look no further. You may have found the holy grail for your particular engine.
[ July 30, 2005, 06:43 PM: Message edited by: 59 Vetteman ]
Well, I'm not going to pour 5W-20 in; I end up getting lifter noise during warmup with my hemi, and 10w30 RP made it go away. I personally think 5W-20 for a high-output V8 is just too thin. I'm still curious, though, about the Mobil 1 Truck and SUV. If the stories I'm hearing about the hemi are true (that the hemi "tick" is from clearances being too tight, instead of too loose), then 5W-40 might be a bad idea.
I tried GC, but my lifter noise during warmup was too much to bear. I mean, you could hear them clicking away. Amsoil was the same thing. RP finally took it away.
I'm not really sure what to think. Maybe I should just abandon the whole idea and try the new Pennzoil platinum next time!
Fitz
I tried GC, but my lifter noise during warmup was too much to bear. I mean, you could hear them clicking away. Amsoil was the same thing. RP finally took it away.
I'm not really sure what to think. Maybe I should just abandon the whole idea and try the new Pennzoil platinum next time!
Fitz
If the RP 10W30 is working fine, look no further. You may have found the holy grail for your particular engine {Quote}
True. But then again, I'm one of those guys who just can't leave well enough alone. Not yet, anyway!
Thanks for everyone's suggestions. Maybe what I'll do is send off a used oil analysis after 3000 miles and see how the RP 10w30 holds up in this engine-
Fitz
True. But then again, I'm one of those guys who just can't leave well enough alone. Not yet, anyway!
Thanks for everyone's suggestions. Maybe what I'll do is send off a used oil analysis after 3000 miles and see how the RP 10w30 holds up in this engine-
Fitz
Very well put. I am running 5w20 in my Focus.....2.0L with 130HP. It is puttin up good numbers. I would just put on a nice filter and MC 5w20. That would be my combo.
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