That is why I posted the uoa of hammers oil. Even if you use a 0w40 if it is fca's spec oil it will very likely be thinner then most 5w30's at the end of the interval. So 5w30 in basic terms = 0w40 as far as viscosity goes, but further the point the 0w40 will have much more undesirable qualities running around at the end of an interval.
So two products represent my working theory on what a hemi needs. Over the last decade, it seams everything has validated this theory, and we would not know how much without the many people on ram forum who have trusted the paper out there and went all in on it.
poll did
redline kill your hemi tick
45 ram forum members say yes, the poll is public
18 said it helped somewhat.
9 said it didn't help at all.
did
lubegard biotech kill hemi tick.
9 say yes
3 say no
11 say noticeably better
In the end of that poll I posted something found by a member here...
So both of those products have high additives (moly) and others such as phos/zinc, plus esters. I would use redline 5w30 like u&a does in his 6.4 hemi, or I would use 5w40 redline, or I would use a good spec oil in 0w40 and add lubegard biotech, specs such as Merc, Porsche, and dexos have stay in grade components and "probably" wont shear down as much as fca's srt oil that doesn't carry those specs.
Alternatively, any 5w40 with a decent additive package again with lubegard in it makes a real good lubrication strategy for the 6.4. Again, two components you need to add is how the truck is used as in towing etc, or where it is as in alaska or hawaii. The colder it is you will want thinner, the more harder it is worked you want thicker, if both you want something thinner at start up and thicker in use, thus 0w40 comes in, and stay in grade base oils will benefit you.
Also, redline 0w30 will very likely be thicker then srt spec oil at the end of an interval, but will give you incredible cold start performance, and high additives will aid that viscosity in heavy duty performance. Look at viscosity specs of any oil you are considering, a 0w30 over 11cSt can be a smart move in cold places. Again the number might scare you off, but the specs surely wont. Depending on the 0w30, it is possible to get better cold performance and better hot performance then the srt 0w40 that fca give you their blessing on. If you did two uoa's on 0w30 redline and 0w40 srt "PUP", I'd wager a good days wage the redline 0w30 will have thicker viscosity at the 5k mark. So why would that scare you off? It shouldn't.
BTW, nothing wrong with that delvac 5w40 if you like it, that lubegard will dress that up nicely though. The srt 0w40 has one feature that tells you what fca says is more important then viscosity, and that is moly, as their srt oil has 250 ppm moly. So we followed that in our testing, and lubegard biotech is an oil soluble moly, so it will boost your additives but not add anything crazy like some other additives do. Biotech is just the good things already in most oils, just boosts the levels. With delvac which tends to be low moly, I like the idea of adding the 15 ounce size biotech. If you have read
oil filter thread, it is a good read, pair that with a spun microgass filter.
. she just happened to mention the gas line being built from Warren to TRF and there were 400 workers who were probably having a tough time with food as everything is closed and nobody in Warren is even doing take out meals.
