Diesel Additives - Time to Change Brands?

[mikester]

 

[The Evil Twin]

Opti- Lube for all my diesels. I don’t bother with their “Ag” formula. Just the red flavor.

 

[CGMKCM]

 

[McMXi]

Opti- Lube for all my diesels. I don’t bother with their “Ag” formula. Just the red flavor.

I decided to try XPD Opti-Lube last spring because it had the best lubricity (wear scar reduction) of the products tested, and it increased cetane rating. I don't care about the potassium content since head gasket failures are not a concern for me, and it was only the presence of potassium in the engine oil (from the fuel addidtive) that TOG objected to.

 

[The Evil Twin]

I decided to try XPD Opti-Lube last spring because it had the best lubricity (wear scar reduction) of the products tested, and it increased cetane rating. I don't care about the potassium content since head gasket failures are not a concern for me, and it was only the presence of potassium in the engine oil (from the fuel addidtive) that TOG objected to.

Potassium in itself is not a problem. Only that it can hide a coolant contamination in an oil analysis. If you know the level is elevated due to the Opti-Lube, then you know what your “normal” level is.
You may already know all that, but others might not

 

[Lug66]

I’ve used Opti-Lube XPD, Boost and Winter in my Kubota tractors and ’14 6.7 Powerstroke since 2014. No problems in 12 years of usage.