i have obviously changed my oil before, but never on the hemi i just bought. it has 57k on it now, any suggestions on which oil everyones been running that have been pretty pleased with it? i dont do any serious towing or off roading, weekend warrior stuff. thanks in advance.

 

There is a poll in the DIY section asking the same question, but here is my answer: Mobil 1 5w20 full synthetic.

 

Same here but that's just because royal purple isn't really available around my part of the woods

 

Earlier years want 5W-30, but anywho I'm using Pennzoil Hi-Mileage.

 

RP goes in mine but if I didnt have it avail here I would use Mob1

 

5-30 Mobile 1 synthetic

 

Picked up some Royal Purple 5w20 for the next change since 7 quarts of Mobil 1 wasn't available to me at the time of purchase.

 

MDS...5w-20
No MDS or disabled...5w-30
Newer API restrictons have forced manufacturers to use lower viscosity oils to improve efficiency. This does not mean it's better for your engine. It's actually worse. They have also demanded extended oil change intervals on what the manufacturer can allow. No manufacturer can mandate 3kmi oil change intervals which is why they are all 5-7.5kmi now.

I use whatever High grade Synthetic is on sale. Mobil1 or Valvoline.
I also pour in a small amount of Lucas Engine break-in additive with each oil change. Engine break-in is formulated with 5-6000ppm of Zinc additive(ZDDP). I put this in because the newer API class of oils has 1/2 the amount it used to. API restrictions cut the zinc from 1600ppm to 800ppm about 10years or so ago. ZDDP is an anti-wear agent and they reduced the amount because it supposedly reduces the life of catalytic converters. Who cares. I can replace a cat for $150 vs an engine that costs several thousand. The newer blends of "Gas Saver" oils or "Recycled" oils have only 700ppm of ZDDP resulting in even more wear for your engine. Yeah, they ceratinly don't advertise your engine suffers. All they say is ooohh, get .00001 more mpg. Go stuff it. Damn tree huggers.

Race blend oils are not restricted and aren't forced to obide by API requirements. Most Race blends are 10w-30 and higher though but contain much more anti-wear agents including 3-4000ppm of ZDDP and other restricted compounds that API doesnt allow.

GM's dexos I and II don't meet API requirements and have actually boosted API to make some changes for the worse. Pretty soon, I bet all you can get is Synthetic oils because they are created by man made dericatives which will save on the amount of crude oil used/wasted.

 

thanks everyone, i just seafoamed the hemi about 150 miles ago. gonna pick up some oil today and change her. then its plugs as soon as i hit 60k!

 

Mob 1 full syn 5w_30