What type of motor oil does everyone run? Im thinking about running castrol GTX 20w-50... Any suggestions/anyone else running this?
Thanks

 

I run Valvoline 20w50 mainly because of the engine shop that built my engine years ago before they went out of business didn't replace the valve guides but just knurled them resulting in oil consumption over many miles. 20w50 isn't as bad as it is with 10w30.


I haven't used Castrol GTX but I do know BMW recommends the use of Castrol though.

 

Mobil 1 10W30.

 

I run what my great grandpa has run in this truck. Delo 15w40 and a motorcraft filter. 430k on a 351m. Still alive.

 

Thanks for the feedback everyone!

 

I also run Mobil 1 10W-30 along with a bottle of ZPPD.

 

Rotella T5 [10W30 synthetic blend] with Motorcraft FL1A filter.

 

Rotella 15w40 with Motorcraft filter.

 

Valvoline 10W40 and Motorcraft filter

 

Forgot to say, I use a Bosch filter.

 

FORD MOTORCRAFT 5W30 synthetic blend motor oil with a FORD MOTORCRAFT FL1A oil filter. What else?

 

I also didn't mention the filter. I run a Motorcraft FL1A.

 

Valvoline 10W30. Either a Purolator, or Motorcraft filter.

 

all my Fords run a FL1A oil filter, even my '58 Ford Workmaster 641 and my '68 Ford 3000 tractors. Difference is my truck I just use plain oil where as my '56 and my '58 641 I run Valvoline VR1 racing oil 20w50 as they are solid tappet lifters and they are older engines where they will benefit from the extra zinc in VR1. The 3000 I ran Vavoline diesel oil in it, cant remember the weight but its the one in the bottle with the Cummings logo on it.

 

This change, Motorcraft diesel 10w30 with a FL1A. Next change will be Chevron supreme 5w30 with a zddp additive with a WIX filter.