LAZRGUIRA Posted August 5, 2011 Share Posted August 5, 2011 Hi all,I have a 1986 Mack superliner with a Rebuilt E6-350... I'm trying to debate which oil is better for my engine.On my last oil change I put Mobil Devac and 1 gal of lucas oil additive. Coming up on 5500 miles and ready for the next oil change.Anyway my question is should i stick with mobil delvac or Delo 400LE? also is that valvaline blue any good?Its a gravel truck.... Also I have a fuller 9 speed that i want to change the tranmission oil too...what oil can i use? thanks in advance Quote Link to comment Share on other sites More sharing options...
Rob Posted August 5, 2011 Share Posted August 5, 2011 I like both oils for the engine. Use Eaton Full Synthetic in the trans.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
other dog Posted August 5, 2011 Share Posted August 5, 2011 We use Rotella at work ,change it at 20,000 miles. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment Share on other sites More sharing options...
Mike Posted August 5, 2011 Share Posted August 5, 2011 I would use what you have been using, the Mobil Delvac. Never have thought it was a good idea to make a change since the engine is broke-in with one kind of brand oil. mike Quote Link to comment Share on other sites More sharing options...
hatcity Posted August 5, 2011 Share Posted August 5, 2011 I run Rotella in mine without a problem. Change every 10,000Trans- 50w synthetic Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment Share on other sites More sharing options...
LAZRGUIRA Posted August 5, 2011 Author Share Posted August 5, 2011 Thanks guys...I'm gonna try Delo 400 LE as it on sale..I see which one the truck likes better. Is it ok for me to put synthetic oil on an old fuller speed? RT14609 Quote Link to comment Share on other sites More sharing options...
41chevy Posted August 5, 2011 Share Posted August 5, 2011 Ive used synthetic in older rears and trannies. The main different I was told by Dutchman Diesel who does our rears and trannies, that synthetic does not break down or degrade over time and the lubrication qualities are more consistant. What I have found is easier shifting and quieter. IMO. Paul Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
hatcity Posted August 5, 2011 Share Posted August 5, 2011 Just be sure to drain ALL the old stuff out. Mixing synthetic with fossil is not good to bearings and such Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment Share on other sites More sharing options...
41chevy Posted August 5, 2011 Share Posted August 5, 2011 Just be sure to drain ALL the old stuff out. Mixing synthetic with fossil is not good to bearings and such Yep forgot to mention give it a GOOD FLUSH. Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
LAZRGUIRA Posted August 5, 2011 Author Share Posted August 5, 2011 How can i flush it properly? Quote Link to comment Share on other sites More sharing options...
LAZRGUIRA Posted August 5, 2011 Author Share Posted August 5, 2011 is it true it my trans holds like 27 pints? so thats like 14 quarts rite? Quote Link to comment Share on other sites More sharing options...
hatcity Posted August 6, 2011 Share Posted August 6, 2011 OR 3-1/2 gallons. Yes.hey, I have 4 gal. sitting here Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment Share on other sites More sharing options...
Bollweevil Posted August 6, 2011 Share Posted August 6, 2011 I like both oils for the engine. Use Eaton Full Synthetic in the trans.RobThe Eaton synthetic will also run a lot cooler. Also, when choosing an engine oil, using an oil that is readily available anywhere, makes sense. Just in case, for some reason you have to add oil. Quote Link to comment Share on other sites More sharing options...
41chevy Posted August 6, 2011 Share Posted August 6, 2011 We've flushed the gear bxes by removing the PTO covers and drain plug(s) and liberal internal spray down with Brakeklean, it won't attack the seals. Others may have an easier or better method than this. You can also get a synthetic and petrolium based oil too. Paul Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
LAZRGUIRA Posted August 19, 2011 Author Share Posted August 19, 2011 I think the delo has been reformulated for low emissions now. I already bought 14 gallons of it. should i return it and get mobil delvac instead? Quote Link to comment Share on other sites More sharing options...
farmer52 Posted August 19, 2011 Share Posted August 19, 2011 I think the delo has been reformulated for low emissions now. I already bought 14 gallons of it. should i return it and get mobil delvac instead?You will be okay using the Chevron oil if it is 15W-40. The CJ-4 oils are backwards compatible. But in the future use Shell Rotella T Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment Share on other sites More sharing options...
jaysm35a2 Posted August 19, 2011 Share Posted August 19, 2011 I JuSt changed the oil in the U600 today , we used Rotella 15w-40 , the Mack tranny , 90w GL-4 will be done tomorrow. Also changed the oil in the air filter base 15w-40 Rotella . Quote Link to comment Share on other sites More sharing options...
other dog Posted August 20, 2011 Share Posted August 20, 2011 How can i flush it properly?I just push down on the chromium plated handle...sometimes I have to do it twice though. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment Share on other sites More sharing options...
Rob Posted August 20, 2011 Share Posted August 20, 2011 I just push down on the chromium plated handle...sometimes I have to do it twice though.Sometimes I have to do that too in restaurants. Depends on how far it is to the kitchen.Rob 1 Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
other dog Posted August 20, 2011 Share Posted August 20, 2011 Sometimes I have to do that too in restaurants. Depends on how far it is to the kitchen.RobYou go to the Chinese buffet too?..tastes great, have no clue what it is! Quote Producer of poorly photo-chopped pictures since 1999. Link to comment Share on other sites More sharing options...
Rob Posted August 20, 2011 Share Posted August 20, 2011 You go to the Chinese buffet too?..tastes great, have no clue what it is!Yes, me and the guys at work eat at a chinese buffet once per week. Have yet to see food staring back at me but I've never asked what it is neither.Always get full and it does a good job of cleansing the colon.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
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