Time to switch to synthetic????
#1
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Join Date: Aug 2005
Location: North Jersey
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Time to switch to synthetic????
Well I am just about to hit 10,000 mi, and will be doing my second oil change. First time I went with Valvoline Premium Blue...good enough for Cummins good enough for me. The thing is the winter is coming and I got a shiny new plow on my truck. So therefore the truck will get a bit of a workout. When is too soon to switch to synthetic...any recomendations on brands. I have a friend that is an amsoil rep...seen that alot on here. Also anyone running fuel addatives in the winter, I've seen Fleetguard offers one.
#2
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I made the switch at 7000miles. I didn't go full on synthetic. Instead I mixed 2 gallons of Mobil 1 truck/suv 5w40 with 1 gallon of Mobil Delvac 15w40... I'll see what this gives me on my next oil analysis at 10k.
#6
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I would agree with Cummins recommendations, however, I believe they might be pointed toward a more commercial use of these engines. More specifically, a vehicle that might travel that 20k miles in it's first few months of use.
I feel, especially with cold weather, using synthetic will do no harm and only good. But to be on the safe side, mixing 2/3 synthetic and 1/3 dino oil, will protect break-in and cold weather use (to some extent). I always tend to over-think things.... jmo....
I feel, especially with cold weather, using synthetic will do no harm and only good. But to be on the safe side, mixing 2/3 synthetic and 1/3 dino oil, will protect break-in and cold weather use (to some extent). I always tend to over-think things.... jmo....
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#8
Originally Posted by trik396
I made the switch at 7000miles. I didn't go full on synthetic. Instead I mixed 2 gallons of Mobil 1 truck/suv 5w40 with 1 gallon of Mobil Delvac 15w40... I'll see what this gives me on my next oil analysis at 10k.
I was thinking in similar terms, but more like going 1/3 syn blend my own. I haven't read of people doing this on their CTD, but from what I understand even a moderate amount of syn in there gives an improvement at temp extremes.
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