Synthetic Switch

derekmorse · January 5, 2010

Hey guys, I know this has been discussed to death, but I couldn't find the exact answer I was looking for. My 2009 2500HD 6.0L is coming up on 1500 miles. I am thinking I am going to switch to synthetic. Is it too early to do this? I live near Boston mass so the climate is warm in the summer and cold in the winter (haha). What weight synthetic should I use? I wasn't quite sure. Thanks!

Derek

gmtech4 · January 5, 2010

I think that the new trucks come with synthetic,check the owners manual ,its in there or call the service manager

other peops will chime in

derekmorse · January 5, 2010

I think that the new trucks come with synthetic,check the owners manual ,its in there or call the service manager

other peops will chime in

oh ok cool I'll check that when I get home!

Nytemare · January 6, 2010

I think that the new trucks come with synthetic,check the owners manual ,its in there or call the service manager

other peops will chime in

oh ok cool I'll check that when I get home!

Factory fill in the corvettes 6.0L engines...and now in the Camaro, vette and Cadaliac 6.2L...I know for sure. Maybe the 6.2 in the trucks as well.

They all come with Mobil 1

And I use synthetic break-in oil on most every new engine I build...than dump it out after burning a couple gallons of fuel and burning in the cam and fill the crankcase with Synthetic of what ever flavor the customer wants...or I use Royal Purple.

derekmorse · January 6, 2010

I think that the new trucks come with synthetic,check the owners manual ,its in there or call the service manager

other peops will chime in

oh ok cool I'll check that when I get home!

Factory fill in the corvettes 6.0L engines...and now in the Camaro, vette and Cadaliac 6.2L...I know for sure. Maybe the 6.2 in the trucks as well.

They all come with Mobil 1

And I use synthetic break-in oil on most every new engine I build...than dump it out after burning a couple gallons of fuel and burning in the cam and fill the crankcase with Synthetic of what ever flavor the customer wants...or I use Royal Purple.

So, I can assume that mine has conventional since synthetic is not stated anywhere on the truck or in the book? Given that I have 1300 miles on it now, should I switch to synthetic now? or should I just wait an oil change or 2 and then switch? thanks!

txab · January 6, 2010

You can switch whenever you like

gmtech4 · January 6, 2010

i thought you where asking about diffs,sorry

derekmorse · January 6, 2010

i thought you where asking about diffs,sorry

no problem, actually I was going to ask about those as well!! haha what about the diffs, would you change the fluids at some point as well to get out the break in junk? Just curious

RaddHazzard · January 6, 2010

There is a magnet that will catch break in debris in the diff. A new one can get to 300 degrees F when breaking in, thats why towing is frowned on in the first five hundred miles or so. But with extreme heat the fluid can be compromised, so changing it is a good idea.

Nytemare · January 7, 2010

See Edited post below....edited this one and a new post appeared....weird

Nytemare · January 7, 2010

I think that the new trucks come with synthetic,check the owners manual ,its in there or call the service manager

other peops will chime in

oh ok cool I'll check that when I get home!

Factory fill in the corvettes 6.0L engines...and now in the Camaro, vette and Cadaliac 6.2L...I know for sure. Maybe the 6.2 in the trucks as well.

They all come with Mobil 1

And I use synthetic break-in oil on most every new engine I build...than dump it out after burning a couple gallons of fuel and burning in the cam and fill the crankcase with Synthetic of what ever flavor the customer wants...or I use Royal Purple.

So, I can assume that mine has conventional since synthetic is not stated anywhere on the truck or in the book? Given that I have 1300 miles on it now, should I switch to synthetic now? or should I just wait an oil change or 2 and then switch? thanks!

On new trucks and cars that come with synth factory fill the Mobil 1 logo is stamped on the oil fill cap. And like was said...you can change to synthetic whenever you like...my 03 had its first oil change at 3000km and the company that leased it than used Pennzoil platinum for every oil change until I got it...than I continued but went up to M1 for a while...than went with Royal Purple.

The diffs are definitely synth factory fill, a synthetic Gear oil made for GM by Rotella I believe I read somewhere. The trans and T-case should be also. Should have Dexron IV ATF in there...thats the new GM synthetic fluid. Not sure what the T-case has in there..it used to be Autotrac II blue fluid...but I think someone said they changed over to something else now....maybe the Dexron IV also.

derekmorse · January 7, 2010

I think that the new trucks come with synthetic,check the owners manual ,its in there or call the service manager

other peops will chime in

oh ok cool I'll check that when I get home!

Factory fill in the corvettes 6.0L engines...and now in the Camaro, vette and Cadaliac 6.2L...I know for sure. Maybe the 6.2 in the trucks as well.

They all come with Mobil 1

And I use synthetic break-in oil on most every new engine I build...than dump it out after burning a couple gallons of fuel and burning in the cam and fill the crankcase with Synthetic of what ever flavor the customer wants...or I use Royal Purple.

So, I can assume that mine has conventional since synthetic is not stated anywhere on the truck or in the book? Given that I have 1300 miles on it now, should I switch to synthetic now? or should I just wait an oil change or 2 and then switch? thanks!

On new trucks and cars that come with synth factory fill the Mobil 1 logo is stamped on the oil fill cap. And like was said...you can change to synthetic whenever you like...my 03 had its first oil change at 3000km and the company that leased it than used Pennzoil platinum for every oil change until I got it...than I continued but went up to M1 for a while...than went with Royal Purple.

The diffs are definitely synth factory fill, a synthetic Gear oil made for GM by Rotella I believe I read somewhere. The trans and T-case should be also. Should have Dexron IV ATF in there...thats the new GM synthetic fluid. Not sure what the T-case has in there..it used to be Autotrac II blue fluid...but I think someone said they changed over to something else now....maybe the Dexron IV also.

Awesome!, thanks very much for the great info! So... that being said, would you recommend getting the diffs changed as well when I do the first oil change? or is that overkill and I should wait a bit? Thanks for putting up with these repetitive questions!

Nytemare · January 7, 2010

I think that the new trucks come with synthetic,check the owners manual ,its in there or call the service manager

other peops will chime in

oh ok cool I'll check that when I get home!

Factory fill in the corvettes 6.0L engines...and now in the Camaro, vette and Cadaliac 6.2L...I know for sure. Maybe the 6.2 in the trucks as well.

They all come with Mobil 1

And I use synthetic break-in oil on most every new engine I build...than dump it out after burning a couple gallons of fuel and burning in the cam and fill the crankcase with Synthetic of what ever flavor the customer wants...or I use Royal Purple.

So, I can assume that mine has conventional since synthetic is not stated anywhere on the truck or in the book? Given that I have 1300 miles on it now, should I switch to synthetic now? or should I just wait an oil change or 2 and then switch? thanks!

On new trucks and cars that come with synth factory fill the Mobil 1 logo is stamped on the oil fill cap. And like was said...you can change to synthetic whenever you like...my 03 had its first oil change at 3000km and the company that leased it than used Pennzoil platinum for every oil change until I got it...than I continued but went up to M1 for a while...than went with Royal Purple.

The diffs are definitely synth factory fill, a synthetic Gear oil made for GM by Rotella I believe I read somewhere. The trans and T-case should be also. Should have Dexron IV ATF in there...thats the new GM synthetic fluid. Not sure what the T-case has in there..it used to be Autotrac II blue fluid...but I think someone said they changed over to something else now....maybe the Dexron IV also.

Awesome!, thanks very much for the great info! So... that being said, would you recommend getting the diffs changed as well when I do the first oil change? or is that overkill and I should wait a bit? Thanks for putting up with these repetitive questions!

Its up to you...its not a recommended service, but you can change every fluid in your truck on a weekly basis if you want...

Personally...I would allow the truck to go through the break in period (5K) with the diff oil thats in there now...than swap it out on the next oil change that follows. If i was going to change it at all.