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Most 40 weights are like 33% than 30 weights at operating temperatures, would there be any benefit to running a 40 weight? I use my 7.3 to pull a 28’ travel trailer in the mountains, hauling up some steep inclines. I ask these questions because I know all about the issues with the lifters...

Saw a voa for the 10w40 version

Would the low magnesium be an issue?

Is lower NOACK better?

Lspi isn’t an issue in a 7.3 gas since it’s not DI, right?

15w-40 causes deposits in the valve lash adjusters, which can lead to damage, allegedly.

What’s with the higher calcium and extremely lower magnesium content in 10w30 z rod?

The valve train on 2019 and newer 6.7 Cummins can’t support 15w-40, allegedly. There was a technical service bulletin about it

Amsoil ss 0w20/30 I’ve used orielly in my Jeep and other vehicles without issue, the 0w20 was consumed though

I accidentally posted it in the wrong thread, meant to post it in the amsoil tear down engine thread btw

O rielly full synthetic

It’s a highlander issue.. I routinely hit 230 driving in the mountains, hit 238 going up Ike’s gauntlet in February. On a 20 weight to boot.. I put A LOT of load on my engine just driving up the mountains in Colorado north of 8000’ elevation. All on 20 weight mostly..

Have you guys ever changed hot 20 weight oil? It flows like water… it literally flows and moves like water that is black. Never saw that when changing hot 40 weight diesel oil.

I was running junk 0w20 in it (orielly 0w-20), switched to a different brand 0w-20 and im not noticing any consumption issues at all

My 2024 crosstrek has only had 0w-16 in it once, on the factory fill. since then it’s had 0w-20 and one time I ram 0w-30 for the lolz. Thinking about going back to 0w-30 on my next oil change.

Amsoil sells quality oil with an easy to use website that makes ordering easy, it’s like they weren’t born yesterday. unlike say hpl that uses stupid landing pages and a complicated ordering process. And what I like about amsoil is you can get what grade you want in what version you want and...

That’s why I asked, I wanted to know why SS 5w-30 was thinner than extended life ore OE

Amsoil 5w- 30 weight signature series oils are thinner than OE and extended life 5w-30

How long can amsoil 0w-20 signature series last when it’s constantly at 230 degrees American Were these flat lander cars?

Prolly