Originally Posted By: HeavyAssault06
I'm quite happy with the ECT/EOT delta split. It's running just fine with the coolant filter and by-pass filter doing their part.
I did see the Delo XLE on their site. I just need to keep an eye out for it locally.
dnewton3 most of your posts are what convinced me to give it a try.
If you have the bypass coolant filter installed and the parts have been replaced, as well as having fresh coolant, then I expect you're in very good shape.
roadrunner1 has seen absolutely stellar results from his JD50 10w-30 lube in his 6.0L. His data is very credible and contributory.
The PS engines tend to want to shear the 15w-40 down to a 30 grade, but they seem to leave the 10w-30 right in range. You either feed it a 30 grade, or it will make one for you! Still - I have also not seen any significant data that shows a 15w-40 that shears to actually result in wear escalation; that is a fear that never manifests into reality. I've also seen no data that indicates heavy towing in heat with the 30 grade is an issue.
The upside to a 10w-30 in the HEUI is that is simply seems to start easier; the injectors are not so "lazy" when cold and they won't "romp" with really cold block temps. The thinner grade is also easier on the starter, and presents less resistance when cranking a cold engine on a super cold day (like we have been getting this season in the midwest).
Thinner oil that pumps easier also makes for slightly better fuel economy. Hence, the entire market heading that way.
On the downside, there's a lack of prevailing availability. But that is changing slowly. More dino and semi 10w-30 is creeping onto the shelves.
Bottom line is this: there is pleny of data to show that it's safe and effective. You can try it; if you like the results you can help forge a new mentality amongst the non-believers and grade-bigots!
