I recently bought some of the clearance fram oil at advance auto parts. I picked up some of the 5w40 dexos 2 approved oil. I didn't realize this was a mid saps type oil. I have a Chevy 6.0 gas pickup that I have ran mobil 1 0w40 and I liked how it ran. Will this type oil work well in a gas GM engine? Other than being a 40 grade and the base oils, would this be similar to mobil 1 esp 0w30?
Fram 5w40
- Thread starter chilson450
- Start date
OVERKILL
$100 Site Donor 2021
It will be fine, probably similar in visc to the Mobil 1 0W-40 you were using previously.
That 5W winter rating would only be a problem below -30 or so. Above that it’s meaningless compared to an oil with a 0W rating.
CleanSump
Site Donor 2026
Mid SASPS is fine since we now have ULSG. It'll potentially be nicer to you cat than full SAPS and we just don't need the high TBN of the old days with ULSG anymore.
The Euro HTHS greater than 3.5 is a plus.
It's also API SN, ILSAC GF-6A.
The Euro HTHS greater than 3.5 is a plus.
It's also API SN, ILSAC GF-6A.
Nope, that's no true.
Even if the oil is pumpable down to -30*C its properties diminish closely before it reaches that temp.
Also, even if it's pumpuble certain low temp. that doesn't mean that the oil provides optimum lubrication and we saw that in a recent youtube video (below) posted by a fellow BITOGer - engine was working, oil was pumping (but not quickly enough), and just took a second before the camshaft lobes on all cylinders got scored.
The cold start test begins a bit after 5:00 min. mark. The oil used is 0W-30 synthetic blend at -35*C.
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I’ve been running 5w40 Euro in my 6.0 during the summers. Nothing special except it’s a 6.0 like yours. Nothing negative to report.
One thing I found is that 6.0’s with a lot of miles will have wear on the cam bearings, shedding lead and copper. Nothing to worry about.
OVERKILL
$100 Site Donor 2021
CCS isn't the pumpability metric, it's the drag on the starter metric (Cold Cranking Simulator). MRV is the pumping test, and it's measured at -5C lower, which would be -35C for a 5W-xx.
Got scored? Where in that 0W-30 start-up was scoring happening? The takeaway from the video was that the 10W-30, which isn't rated to pump at -35C (it's rated at -30C) well, didn't. It took a minute and a half to get the engine started and then almost 40 seconds for the oil, that was gelled, to pump. This is meant to highlight that you should use an oil with the correct Winter grade for the anticipated ambient conditions, so if you are seeing -35C, you should be using a 0W-xx.
He may be in Michigan, but it's almost April. I doubt it would matter at all, but at worst, it'd be fine to run for the next 8 months.
You, like most people do not understand what it means when an oil is pumpable.
The oil is pumpable all day long. And an oil with a 0W rating may not be thinner at that temperature.
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Thanks everyone. I feel more comfortable running it now. I'll be due for an oil change in about a month and the 5w40 will be going in.
