Synthetic VS Semi-synthetic Poll

First I wouldn’t let the TA touch the truck.......

2nd full synthetic for cold start protection....

 

How much does t/a charge for the semi synthetic PM?

 

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For 10 gallons of synthetic blend. (Oil Only)

 

Full lab oil sampling is the only safe way to determine extended oil drains.

I use semi synthetic at $16/gallon, bypass filtration and change oil based on oil samples, typically 30-50k intervals.

Soot, silicon and wear metals are typically low - base number (acidity) and viscosity generally spur me to replace oil.

A manufacturer recommendation would not scare me.

A TA/Petro/Speedco plunges a hot knife of fear into my core, and lack of samples would twist said knife.

 

Detroit is bending me over on filters. My F/W separator is 100 bucks and Donaldson hasn't come up with a approved filter yet. I'm spending 600 bucks on a Semi synthetic PM on a 2018 DD15 knowingly getting gouged. I won't let TA touch my truck but dang. I changed the oil on my 60 series myself but this one nope. No wonder people trade these pos in when the warranty is up.

 

Yes I do.

I know of a half dozen horror stories from the chain stores.