Redline 15W-40: interesting results

[Hohn]

NO oil wars, please, just here to report some interesting findings after recently switching to Redline 15W-40 from Delo 400 (also a good oil).

1) Peak boost is up. Before with just the EZ, I could only hit 27psi. Now I have hit over 30 (oil was the only change).
2) Turbo comes down slower when you let off. Instead of the needle diving to zero as soon as you lift, it seems more to coast down now. It's subtle, but noticeable.
3) Cruise boost is about a 1-2psi more at my standard speed of 75MPH. This is from calm days (no headwind).
4) SLIGHT reduction in average EGT-- like 30-50°. I think the marginally higher boost plays a role here.
5) Engine is quieter. Not so much from outside the truck idling, but from the inside cruising down the road you can tell that is runs a little smoother, with a little less clatter. This is only the case when the CTD is at or near operating temp (within the normal band)
6) the turbo spools a little faster.


I can only theorize that the oil has reduced friction in the turbo, allowing it to spool more quickly, maintain a higher speed for a given fuel rate, and spin down more slowly. I hope I also have similar friction reduction in the engine itself.

It makes sense for the above enhancements to happen, since Redline's base stocks are the same as those used in jet engines, and designed for turbines and high speed stuff.

At initial blush, I am very pleased, and as happy with the Redline oil in my CTD as I have been with their other products used elsewhere.

HOHN