NeverSatisfied02

iTrader: (12)

My truck calls for 5w30 from the factory. I am running castrol syntec 5w30 in it and have been for the past three oil changes. I have a RCSB 5.3. Is the 5w30 the ideal weight to use or is there another weight that is better for the truck? Take into consideration, i live in Texas and it is a little warmer than most other places. let me know guys!! THANKS!!

slamed 04 silverado

I would run Mobil 1, Amsoil or Redline. In the winter run the 5-30 and the summer run 10-30 or 10-40. I live in California and in the winter i run Amsoil 5-30 and in the summer i run Amsoil 10-30. I hope this helps.

bud8fan

iTrader: (9)

i also run 5w30 castrol syn in mine as it(5w30) is recomended by the manufacturer...

Scream

iTrader: (6)

I've been reading up on German Castrol. Do a search for it in the internal section...sounds like good stuff! That's probably what I'll be running when I get the new engine built.

SnakeOiler

iTrader: (6)

I would think that the manufacturer recomended one would be the best. But I'm no oil expert.

I use 5W-30 Mobil 1 in the car and the truck

goshawk23

i use mobile 1 5w-30 in my truck and my TB

greentahoe

iTrader: (2)

I went to 4 places looking for that when me swapped my cam. Couldnt find any That stuff sounds pretty amazing!

NeverSatisfied02

iTrader: (12)

I like the syntec myself. I was thinking of trying another brand like royal purple or amsoil but the shop i spoke with told me the syntec is good stuff and if i have already been using it, there is no need to change oils. I will probably switch to 10w30 next oil change since we are coming into warmer weather now. Is all that talk about engines locking up from the oil being to thin true? I wouldnt think that would be likely to happen if the recommended oil is being used.


Thanks for the info so far guys!

Texas Terminator

standard castrol 10-40 year round will do you just fine.

BigKID

iTrader: (5)

I use 0-40 Mobil1 since Mobil's synthetics are on the thin side of the weight scale. If we had it around here I would be willing to try the 0-30 German Castrol. Other than that, I will stick with Mobil.