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He means it doesn't say endorsed by Cummins on the front of the premium blue bottle anymore.

Mobil oil and Mobil filter for my 351W in an F-150.

In Texas a 15w40 Diesel oil is all you probably need. I have not seen anyone post UOA's of a 0w40 vs a 5w40, I've been curious for quite some time if it would hold up better or worse than it's 5w40 counterpart in the same flavor/brand. But after getting a price for a barrel of the same 0w40...

I have a .060" restrictor in my 2020 6.7L Powerstroke's DIY Bypass setup. No pressure gauges, but it gets plenty dang hot so I know it's going through there just fine. Couldn't begin to tell you the flow these engines put out is in the same realm, but I'd bet it's close enough. An 1/8" hole on a...

Am I the only one here that thinks some posts are made by bots? Not that this particular post is, just saying some seem like they could be. @Japanese which engines do you think 'always run better with lower viscosity oils'? And how far can one lower the viscosity to see this better performance...

I can't find these on ACE's website and have no idea if they were ever on there. The sign in the store said they were marked down to $50 from $200. Quickly looking around online and the cheapest I see these is from TSC for $215.99. I have been trying to figure out how I want to do a fencing...

I just ordered my test kits from Polaris. I'm planning on doing a Virgin analysis on Phillips 66 5w40 Guardol XT. I thought I would do the initial test and ask for the TBN. Then I was planning on asking for the TAN on all the used oil analyses that will follow. For now I only plan on testing for...

You know how we know that you have not kept abreast of what the baby DMAX has got going on? Which honestly you're not alone. The more I read about it the more I shake my head.

Why on earth would you or anyone do this?

It just all seems fishy to me. The way they are doing it this time is different than the other times I have done this. This one is run by [email protected] which was the original kinda red flag for me. I searched them and see that guys here on this board have gone through them before without...

Another dumb question. I see USPS Prepaid Return Envelope Mailer / Closest Lab $6.45 Prepaid UPS Return Label/ 10 Samples $16.00 Is the USPS more because it has a return envelope? And the UPS is just the label? The 10 pack of kits I am purchasing comes with mailers. So I was going to go with...

I almost think that they had not enabled that part of my account because it is so new. Because I did exactly as you described previous to asking you and it took me somewhere else. Now I'm into the store and can add items to my cart. Anyhow works now. Thanks. ETA: The store looks different than...

@Hohn I can't seem to find the store? I am logged in but when I am out in the google search area I can find a link to a store that looks like this But when I am in my account and click on the store tab it looks nothing like that.

Can you take a screen shot of the list of retailers. I wonder if I've got some sort of cookies problem. I can only find the 2025 rebate rules/terms. Everything else I saw was a link through the 2026 rebate on Blain's Farm & Fleet.

I saw this the other day but it seemed to only be through a retailer far away, and shipping would have eaten up half the savings. Also this one isn't run by Mobil. Someone else is running it for them. Didn't seem worth the hassle. Figured maybe there was some sort of glitch in the matrix and at...

I was at the Billings Location.

It was a bust. They had the kits on hand but didn't have any info. for me besides where to call to get the info. Called and got a message machine. Bought the kits anyway as I asked if they were returnable if the testing didn't do what I want, they said yes. So got home later and called again and...

This link is dead. Is this the correct info here? ASTM Test Monitoring Center HDEOCP Minutes. I have been wondering about this forever, but never searched it.

This may come off as rude, but so be it. You are a bit odd. I feel like there is some sort of language barrier (new to English) or you are perhaps a bot. I know where I can find 5w40 oil. They have it pretty much everywhere. I live in a small town, but there are probably 2 or 3 stores I can...

If the operative word in your statement is 'needs' then sure. But if you are saying that there is no difference in running an oil that shears more vs an oil that shears less...? I don't think anyone is saying they need to switch to a 15w40 for the summer. And I don't want to speak for the O.P...