Mobil 1 10w30 Full Synthetic.

It's what I use in my VWs/Audis as well.
In my opinion it's the best oil on the market. Hands down.

 

I use Napa 10w30 and Napa gold oil filter.

 

Mobil 1 Extended Performance Synthetic 10W30 I do notice a slight lifter tick when the motor is hot but only at idle, bump it even to 850 and it stops. Big difference in mileage. I went from 11.7 avg to 12.6, all things considered...that's covering the cost of the oil right there and then some. Now that's a big *** ram with 37s and 7 inches of lift and a 6450lb curb weight with half a tank.

 

Either Castrol GTX(Conventional) or Quaker State. I put 5W30 Castrol in for the Winter and have a jug of 10W30 Quaker State ready to go for the summer

 

What would you guys recommend for my 5.9 with 230k? doesn't seem very leaky so thinking 10w 30 of some sorts?

 

I burn a fair bit.... so, I use the cheapest 10w40 advance has on the shelf.

 

Thanks, Just finished my oil change and did a minor road test but i went with Mobil 1 regular 10w 30 and the molar filter from wally. And wow just she idle good and just over all it run like a new engine. Now mind you the previous oil was toast and had a crappy filter etc... So it needed it. Will continue to test more Tons of great info in here.

 

Just built and bored a motor has 0 miles high compression cammed motor I wanna run the best oil but will take ur option. Rather spend the extra money on good oil in the long run. Especially when I want to make horsepower.

 

Use a good dino oil for break-in. Change it at 500 miles, and run whatever you like.

 

Castrol high mileage synthetic blend 10w-40.