- Apr 20, 2021
- Reaction score
- San Antonio
- Ram Year
So are you saying that the Mobil 5/20-5/30 synthetic is not a superior oil? I've looked into redline but never bought it, I figured it was just a name and therefore that's what you are paying for. I had a machinist that rebuilt engines for Nascar tell me that the Mobil 1 is what they run. So, I figured it was good for this engine. My oil temps had been running in the low 300 deg. range. however, that was during the summer last year when it was 105-109* in July Aug. Thought of adding a oil cooler however haven't had time to research the concept yet. however, the lower thin portion is solid just looks louvered and will be changing to billet look to get more air across the oil pan on bottom. no grill shutters.Your RPMs sound normal and inline with my truck. I tow at 2300 RPMs and hit 3000+ up steeper hills, no worries at all.
But if I were you I'd run a high quality 5w-30 synthetic oil. Redline 5w-30 is an excellent candidate, or if it's too pricy for you then Mobil 1 FS 0w-40 with 12oz of BioTech Lubeguard. (I'm running HP oil but haven't yet towed with it nor had it analyzed yet so can't yet recommend it though I suspect it will be my permanent oil choice.)
Watch your oil temps and stay below 250F. Slow down or take a break if you hit those temps for more than 10 seconds while cresting a hill or whatever. If you have active grill shutters, you can buy a few seconds of cooling by removing them. I've also purchased an external oil filter relocation kit which should help keep the engine a little cooler as well.
You don't need a diesel lol. The hemi still tows more. The problem is not the engine revving to 80% of redline, the problem is our misunderstanding of damaging the engine by doing so. Once you realize the engine doesn't care (proper oil/temps notwithstanding) you'll be more comfortable towing with it.
Also you may be a little surprised/happy to hear that the 5.7 was used in the 2500 heavy duty trucks. It's seen a lot of work and abuse, there are no real issues that have arisen from working the 5.7 hard.
Oh, also change your oil no later than 5000 miles when towing. I'd also recommend running 89 octane while towing, it will keep your engine cooler with a cleaner burn.
As for the fuel I usually fill with 89 or 93 when towing it seems to burn better but hey it's most likely me and you know the macho concept LOL
As for the diesel concept one day I'll get there but for now I'll use this.
I usually change my oil @7k intervals but yea I see your point.