Hello, I have a 1989 grandvilla, 3208T 250HP, back in 2008had a complete engine and Mt 643 transmission replaced by my friend over in Houston Tx By stewart stevens did a great job in has 7500 miles on the engine and trans didn't know what oil was used called them said it would have been a 15/40 Detroit oil, now I owned a trucking company 10 years and used 15/30 rotella want to ask what do you think needs to be in a rv that doesn't travel a lot there is a lot of good oil companys out there thanks
I run Rotella 5-40 T-6 and am getting good oil reports.
Bill
Depends a little on what temperatures you will be operating in.
15-40 is a very good choice for all around use. Shell Rotella T is a good choice, but there are other good ones out there.
Yes, if operating in very cold temperatures a 10-30 may be more appropriate.
Jimmy if I owned your coach and had a friend at the engine shop my coach would have the marine twin turbo bolted on my 250 3208.
Yes I know all about the trans. IF you only got on it in fourth gear it worked great. Had a Texas guy with one with 95k on the changed top end.
I asked why he had a radar detector on his 250 cat ored and he lifted the bed and showed me.
Went for a drive. Wow.
Got 10mpg
MY oil pressure at 2000 RPM cruise is around 60# with Rural King synthetic 10/40. The Rotella 15 /40 was a couple # higher at all ranges. The syn is much better for the turbo and will not coke it up.
I add a couple of quarts every 2000miles.
The synthetic will run 15K miles and return a little better fuel range and cost less overall.
Pretty much any 10/40 or 15/40 with around 900 PPM or more Zinc, should be fine.
One thing I forgot, there is a rebate on Shell Oil. Look here for more info.
Diesel Oil Coupons | Motor Oil Coupons | Shell ROTELLA® Rebates | Shell ROTELLA® (https://rotella.shell.com/en_us/coupons-rebates-and-sweepstakes.html)
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Bill