Synthetic Oil

RedGMC05 · October 4, 2005

Could you use synthetic oil for the 2005 GMC sierra 1500 motors? I was just curious can anyone help me ?

JimsZR2 · October 4, 2005

Could you use synthetic oil for the 2005 GMC sierra 1500 motors? I was just curious can anyone help me ?

<{POST_SNAPBACK}>

Just run pure regular 5W30 or a run a BLEND

There is no need to run a full synthetic because the flashpoint of the oil will never be hit.

Mighty HD · October 4, 2005

If you plan to keep it for a long time, run it. You can't go wrong with it.

3500in nc · October 5, 2005

If you plan to keep it for a long time, run it. You can't go wrong with it.

<{POST_SNAPBACK}>

run it if ya can the less friction the less power loss

fossil · November 11, 2005

If you live where it goes to -40, you bet, much better flow on start

ridnlow · November 24, 2005

I run synthetic oil, cant beat changing oil once a year..

GMCStepSide · November 24, 2005

I live in Alaska...our winters aren't as severe as they were when I was a kid but we still see alot of subzero mornings. I have always used synthetic and have it in my 2005 GMC 1500, and wouldn't consider doing it any other way. Startup on the cold mornings makes it a necessity. The local GM dealers all offer the synthetic and I know my local service manager uses it in his personal truck.

Personally, I believe it comes down to how much strain and wear you're willing to put on the engine. For me, I've used Mobil 1 for years and have had trucks/cars that easily went 175,000 plus without any problems. I'm not a salesman nor do I own stock in a oil company, I just know what I've experienced and for cold climates there is nothing better than synthetic.

Bo185 · November 27, 2005

MOBIL 1 it's worth it!

plainvanilla · December 7, 2005

MOBIL 1 it's worth it!

<{POST_SNAPBACK}>

Mr. Smith · December 13, 2005

Could you use synthetic oil for the 2005 GMC sierra 1500 motors? I was just curious can anyone help me ?

<{POST_SNAPBACK}>

Pour it in. You can't go wrong with synthetic.

jsbossert · January 11, 2006

I heard synthetics will exagerate an oil leak, is this true, Im soon to do my 1st oil change, All my previous vehicles Ive use regular pennzoil 5/30, thanks

juicy · January 14, 2006

I heard synthetics will exagerate an oil leak, is this true, Im soon to do my 1st oil change, All my previous vehicles Ive use regular pennzoil 5/30, thanks

<{POST_SNAPBACK}>

its true if you decide to swap from dino to syn on a higher milage engine...

Tor Diesel · January 15, 2006

Regular oils can create a buildup around seals and gaskets. Changing to synthetic will break down those deposits. If you already have a leak then the leak will exagerate due to the already mentioned reason and synthetic oil's better flow characteristics. For your 2005 there should be absolutely no reason not to switch. Synthetic lasts longer, protects better, and can even get you slightly better gas mileage. Its stock on Corvette, Porsche, Mercedes, etc.

FYI - I switched to synthetic on my 4Runner at 140,000 miles and have had no leaks and now burn less oil than before (1 qt per 10000 miles vs 1 qt every 5000 miles)

Mr. Smith · January 16, 2006

I heard synthetics will exagerate an oil leak, is this true, Im soon to do my 1st oil change, All my previous vehicles Ive use regular pennzoil 5/30, thanks

<{POST_SNAPBACK}>

its true if you decide to swap from dino to syn on a higher milage engine...

<{POST_SNAPBACK}>

Uh no...

I went to M1 at 73K on my 97. No leakers here.