rotella t6 5w40 diesel oil. nothing else.
I use Rotella 5-w40. I've been using it for like 5 years in my 02 1.8t and haven't noticed any wear really at all. I drive pretty aggressive, redline 3+ times a day.
I have done really well with Shell Rotella T6 5w-40 as well. All are good oils that you can get away with changing every 5-6,000 miles.
This Rotella T run looked good.
I have been trying the Shell Rotella T6 out for the last 3 changes. seems to be working out quite well so far. Just checked my fluids yesterday after 2k miles and I only needed about a quarter of a quart. not too shabby.
When I bought my '80 MB 300SD I did an oil chamge with 15w40 Rotella. The first day it dropped below 35* it struggled to start. Below 25* it needed a few hours of block heater time. I changed it out to 5w40 Rotella T synth and 6 years later I've still never plugged it in, even in -10*F.
Strictly anecdotal, but at 56,000 I switched from the usual suspect Castrol to Valvoline Synpower. Engine starts more smoothly and observed mileage on highway has gone from approx 30 to approx 34 mpg.
So far, though, it appears that engine wear and presence of contaminants, as shown by UOAs, are significantly "better" with Rotella T in my car's engine than they were with any other oil I used, and especially Castrol Syntec 5W-40.
I was running Motul 8100 and got tired of having to pay alot of money and get it shipped, so I did alot of research and found that overall, the Rotella is one of the best oils for the price, so I switched to that. I notice no difference in power, and it costs alot less
And I use a 15W40 diesel oil year round here in the Bay Area, currently Rotella-T, but have used Mobil Delvac 1300, Delo and others.
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