I agree. A lifter change may be in order if i experience pump up issues with an oil over 15Cst at 100C. Just wanted too see if anyone could recommend a *w50 with a rating closest to 15 to try.
Its a gen 3 LS1. No i do not though. These engines run 220F at operating temperature, so we are guessing at the oil temps based on the fact we will see 220F coolant temps. The oil temps will obviously exceed the coolant temp. Especially on hard pulls. Once i have it running I'll monitor oil temps to get an exact reading, but for now we were just looking for an oil to keep things happy during that time. I wish Driven Oil provided technical data sheets for there oils. Im interested in the specs on DT50 vs HR3. I have emailed them with no response. Schaeffer's and Driven are my go to choices for my daily drivers so never really got into the technical data till now and wouldn't have thought twice about it until Morel told me the hydraulic lifters require certain Cst ratings to perform properly. So I've been studying everthing this site has to offer to get a better understanding of these properties.
Renewable Lubricants Inc had 5W40 around 15Cst. However; formulas change. I would go direct with HPL and RLI.
That's a high level street performance cam on that displacement. I don't think you need a 50 grade - unless your builder is covering a mistake. That's heady over the nose pressure for a Hydraulic. Whats important here is preload and how careful the builder was with pushrod selection. Did you call Morel and discuss this? Are the lifter appropriate for the cam and springs?
Yes Morel said my open and closed pressures are fine for the lifter and camshaft lobe ramp rate. Preload is .060, morel spec, with a .120 full plunger travel. So halfway. This has been double checked by me personally with a dial indicator. Oil will changed every 3,000 miles or 6 months. Which ever comes 1st regardless. The engine was built a little looser then my liking being an aluminum block and the expansion rate of aluminum. It will open up those clearances quite a bit. What HTHS 40 would you recommend?
I agree fully. I just thought instead of searching through all the data on different oils someone here might have VOA's or know personally of an oil that comes in close at 16.3 that i could try.
I appreciate this info. Thank you
They definitely would not. That’s the really funny and silly thing about this, it’s very possible the oil will operate a temperature that changes this very specific “requirement” in the engine. Should he expect a failure when operating in the winter when the engine may never reach operating temperature?
Agree, some of these “requirements” are curious, especially the Xw50 requirement for something that’s not significantly different from a stock LS1… my brother’s aluminum-blocked LS2/3 hybrid that sees shift points of 72-7300 and makes well over 600HP at the crank uses Rotella T6 and even uses factory LS3 rocker arms on the 242/254 .621/.610 cam, albeit with Comp Cams upgraded trunnions. I forget which exact valve springs are on it, but they’re PAC beehives. We put that together in 2006 or so after an issue with his 383, and it hasn’t been out of the car since.
