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Other than the viscosity lowering to 8.9 this sample looks great to me. The fuel is not effecting the wear metals. I'm running a bottle of Gumout complete fuel system cleaner through it now. I'm thinking of using the Supertech Full Synthetic 10w30 next run to see if the final vis stays in grade...

Posted in the Gasoline UOA section. https://bobistheoilguy.com/forums/threads/2019-ford-f250-6-2l-101k-starfire-10w30-hdeo-6-000-miles.384350/

Lots of idle time and some towing. I’ve been running this oil in my entire mixed fleet and it’s showing that it’s working well.

I spoke to Starfire technical support about another product application this week. While on the phone I asked about the oxidation number and base oil used. He didn’t say who it was from but confirmed that the synthetic blend HDEO is group 3 and group 2+. I feel like this product is a great...

Right. It looks like the older HDEO oils when 1300 was the norm.

ALS tribology was the lab used. The service is through Chevron lubewatch and they did recently move to the lab in Georgia. The lab was in Ohio but due to the new zinc trends in HDEO samples, the equipment is better suited to handle the samples in the GA lab.

It’s labeled a synthetic blend and with the oxidation number being a 12 I’m wondering if there is some GTL in there?

Have been running this in my fleet of diesel/gas vehicles about a year with great results. Most of the diesel trucks are ISL 9.0 Cummins which spec 15w40 or 10w30 for fuel economy. Originally purchased as a lower cost one oil for all vehicles solution as it’s gas rated too. So far so good. Wear...

Never seen a bad Premium Guard product. Not saying they don’t exist, just saying I haven’t seen one. Sad when the Chinese made filters are higher quality than the USA made stuff.

That’s fine. I meets the requirements of my 4 machines. It was just an option to look into. I’ve got it in everything except my wife’s new car because the calcium level is over 2,000 ppm and her care is a turbo direct injected 4 cylinder. If it was naturally aspirated I’d have Rotella 10w30 in...

It’s the regular non synthetic

New Valvoline 10w40 motorcycle oil (blue bottle) Jaso MA2 rated

Would you consider running Rotella 15w40 in it? I bet it would hold to a 40w and do great at a price low enough to change more frequently. The only reason that might hold you back from using it is warranty coverage. I doubt that would ever become a problem as the oil is very good at those...

I have spoken to premium guard before with questions about there products. They recommend the base filter for 5k intervals but told me they test them to 7 or 8k miles and they are fine. The extended life filter is good till 10k miles but I don’t know how far they run them to test. When they were...

Switched my John Deere gator filter to a Supertech last year and glad I did. The dealer wants $12 for it now compared to $3-$4 at Walmart. American made, fits perfectly and cheaper.

This is a sample that was run 250 hours. The wear is lower than with any other 15w40 this truck has run. I’m looking forward to comparing it to the unused product.

You may add them if you’d like but they are known to be inaccurate. As for new results with those oils, the lab said they are no longer on file and can’t rerun them. I currently have a new sample of Starfire 10w30HD CK-4 being analyzed now. I’ll post that one if you’d like. It has been showing...

Yes. That is correct. The correct zinc content for those two oils is supposed to be 1200-1300 per the manufacturers. The lab is saying that a high dosed sample must have run before these and left trace amounts which added to my samples. They said they will address it with the technicians.

Incase anyone wanted to see the samples with high zinc in them.