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11/04/2021 5:26 pm
Topic starter
Hi Scotty I got a 2001 GMC Sierra 6.6 turbo diesel. Long story on how I got the truck however I need to take it for an oil change and I’m not sure exactly which oil to put in it. Not sure if previous owner put synthetic in. Does this vehicle need synthetic car has 220k Milrd
4 Answers
3
11/04/2021 11:30 pm
Try synthetic. If you notice you have some leaks at the seals, switch back to the conventional oil.
2
11/04/2021 11:49 pm
Check what the manufacturer recommends and make sure the oil you use meets those standards and you'll be OK. In general Chevron Delo and Shell Rotella are excellent diesel oils.
1
Does it matter if someone put regular oil and I do synthetic.
probably not
0
11/04/2021 5:42 pm
Use synthetic, more expensive, better protection.....
