Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 15, 2025 ...

Engine oil

November 27, 2018, 09:05:45 pm

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

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Re: Engine oil

Reply #1 – November 27, 2018, 09:18:06 pm

I run Rotella 5-40 T-6 and am getting good oil reports.
Bill

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Re: Engine oil

Reply #2 – November 27, 2018, 09:18:37 pm

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.

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Re: Engine oil

Reply #3 – November 27, 2018, 09:26:11 pm

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

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Re: Engine oil

Reply #4 – November 28, 2018, 08:26:33 am

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.

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Re: Engine oil

Reply #5 – November 28, 2018, 10:45:49 pm

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®

Better Fuel Economy Meets Better Wallet Economy | Shell ROTELLA®
Bill

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