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Topic: Oil change (Read 1743 times) previous topic - next topic

Re: Oil change

Reply #25 –
Hummm kind of looks like engine oil is like tires. Right weight and spec no wrong answer, what ever makes you feel good 😊
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Oil change

Reply #26 –
Quote from: bbeane –
Hummm kind of looks like engine oil is like tires. Right weight and spec no wrong answer, what ever makes you feel good 😊

It's like wearing Levis or Wrangler jeans all your life: you can switch, but never change to other brands!  ^.^d
1993 U-240 "La Villa Grande"..CAT 3116 w/ Pacbrake PRXB...Allison 3060 6-speed..
Previous: 1983 Airstream 310 turbo diesel, 1979 Airstream 280 turbo diesel
                                      Build # 4297
                                      PNW natives
                      Home base:  'Cactus Hug' (Ajo, Arizona)
                        DW Judy & Chet the wonder dog
                        Full-Timers 'Sailing the asphalt sea'

Re: Oil change

Reply #27 –
Yes it's a feel good thing.. I've been using the same engine lube since 70.. I'm stubborn like that when something works for me. I did let General motors talk me into putting syn mobile 1 in a late model Corvette and I feel like a chump for not putting my tried and true penzoil in it. Personally I think all engine mfgs blow a bunch of smoke about different lube products and I think it's because they have stock in the said product but then I am antique and a big skeptic about sales people. Right back to the feel good thing, crap if you feel good that's about all that matters in the end.
Dub McBride 1996 270

Re: Oil change

Reply #28 –
Quote from: Jim Sizemore –
I have yet to put the Schaffers in my 8.3. Most likely would be ok. I use the t6 in everything else I have and just requested my son to pick me up 5gal of the Rotella. Will make me feel better and I guess that's what matters? I got to wondering about the friction modifiers in the Schaffers and know Honda doesn't want them used in my Valkyrie wet clutches. Is there anything in my 8.3 that wouldn't want that?

Jim


<Hijack alert!>
Got me a 2000 Standard with 75K on her.
Watta you swing your leg over, Jim?
<end hijack zone>
In restless dreams I walked alone.
Narrow streets of cobblestone.


'93 U225
Build 4337
'14 CRV Toad

Re: Oil change

Reply #29 –
Exception is the DD two strokes that do require special oil such as Delo 100 (not synthetic) but getting harder to find.


Define "DD" please?
I have thoughts on the two stroke, but don't want Michelle mad at me!
In restless dreams I walked alone.
Narrow streets of cobblestone.


'93 U225
Build 4337
'14 CRV Toad

Re: Oil change

Reply #30 –
Quote from: Moby –
Exception is the DD two strokes that do require special oil such as Delo 100 (not synthetic) but getting harder to find.


Define "DD" please?


DD= Detroit Diesel.  So, in Foretravels, that would be the U300 with DD 6V92 (6 cylinders, V configuration and 92 CID/cylinder).
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Oil change

Reply #31 –
Good read on synthetic oils: Best Synthetic Oils Explained: Information and Recommendations  As I said before, I would love to put synthetic oil in the 6V-92TA but it has a couple of areas that would need to be addressed. Our camshafts (one for each bank) not only operate the four exhaust valves but also must use an extra camshaft lobe and pushrod to operate each cylinder's unit injector (combination injector and high pressure injection pump). This requires high loads on the camshaft lobes and followers. Two cycle diesels always have positive pressure on the tops of the pistons so wrist pin lubrication is different from the four cycle brothers. Using multi-grade oils have shown accelerated wear on pistons and cylinders.

Using a multi-grade synthetic is probably, I say probably great but after looking at the photos, even the slightest chance of increased wear on some parts is not worth the chance. Yes, two cycle motorcycles, chainsaws use synthetic as OEM today but their two cycle principal does not have much in common with the 2 cycles that Detroit/MTU produces.

At $100 for 7 gallons and a filter, it should still last at least 500K with the Delo 100 #40 so why risk it until Mercedes/Detroit advises otherwise?

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Oil change

Reply #32 –
all the specs I have seen on small engines say not to use synthetic oil for break-in. the molecular strands of the synthetic are longer and the rings will not seat (wear in) correctly. So, to me that means that the synthetic is more slippery and a better lube if used appropriately.

A number of years ago I was on a North Carolina Ferry and they had just on-loaded a bunch of 55 gal drums of some engine oil. I spoke to the engineer and he said it was to change the oil in the propulsion engines. I asked what they did with the old used oil and he said they mixed it in with the diesel fuel and burned it. I expect the EPA would not allow that now. Also,  Cummins designed a system to change oil while on the road for road tractors powered by their engines. It injected new oil into the engine sump and mixed used oil into the fuel.  I don't think they ever marketed it do to pollution laws. This was told to me by a cummins engineer.

Wantabe

Re: Oil change

Reply #33 –
Yes, working with Mercedes diesels since 1973, I encountered many owners who dumped their used oil into the fuel tank. No, it would not fly with the EPA today plus not so good for the engine internals.

The long chain molecules you describe were supposed to be the reason for rapid deterioration of the early petroleum multigrade oils . Today's synthetics are small, uniformly sized molecules unlike petroleum based lubricants with molecules that vary in size from small to large.  This is why early synthetics were more prone to leak past seals. This has been mostly cured by additives and new seal construction.

Yes, many engine manufactures like a petro oil for the initial oil change and then going to synthetics. Synthetics DO provide better lubrication and may not allow the rings to seat properly.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Oil change

Reply #34 –
My understanding is "conventional" oils are 50% synthetic roughly.  So the differences are muted.

I have shipped several hundred single cylinder dirt bike four stroke engines in the last dozen years after rebuilds.

All used to be shipped with full synthetic.  A percentage had ring seating issues new.

Switched to 50-50 conventional oil.  No more ring issues. 

On long term teardowns the best synthetics had almost no internal engine wear on sliding surfaces. 

Break in was the only time the higher friction helped.  Five hours.

My understanding is that all engine makers use some kind of break in oil. 

And prerun their motors under load to seat the rings.

I tell my customers to break in my builds under load.  Up hill. 

And if not used hard regularly to go back once in a while to conventional oil and to tow someone in soft ground.

Reseat the rings.
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Oil change

Reply #35 –
Bob,

My Suzuki PE250 has done Barstow to Vegas twice and lots of desert/trail riding. The head has never been off. Used nothing but Amzoil 2 cycle.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Oil change

Reply #36 –
Know idea on two strokes.  Only on these particular four strokes.

I am getting around 800 hours top end life where new they were 300 or so depending on filtering and altitude and how hard they were revved.

"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Oil change

Reply #37 –
Oil. Black gold. Dinosaur dust..

If you are asking about changing your oil, you are doing just fine. As long as you change it and keep it topped off... no matter what brand it is, you can keep your eyes on the horizon and your food on the petal.

The cost of oil correlates to peace of mind... but if you run out,  it's gonna cost a lot. $$$
Paul
'92 U300 SBID 40'  #3968 "Large Marge"
Detroit Diesel 6v92TA & Allison HT746
'09 Mini Clubman w/ manual 6spd @ 39 mpg

Re: Oil change

Reply #38 –
Although, I'm told delo 100 40wt or nothing.. for the 6v92 DD. See! I listen
Paul
'92 U300 SBID 40'  #3968 "Large Marge"
Detroit Diesel 6v92TA & Allison HT746
'09 Mini Clubman w/ manual 6spd @ 39 mpg

Re: Oil change

Reply #39 –
Wantabe posted about the Cummins Centinel System.  We actually have that on our coach (previous owner had it installed).  The selling points from Cummins are the oil gets changed every 525,000 miles and filter gets changed every 75,000 miles.  Filter was just changed so I'm good to go for awhile.  We've put about 8,000 miles on her so far and I've added around five gallons of oil in that time.  There is a large reservoir on the left side of the engine compartment, just inside the door, that I would guess holds six gallons or so of oil.  There is a sticker on the engine that says to check the oil level every day.  It has always shown right on the full line.

My great big oil pan was put up in the attic of the garage :-)
Kurt & Shanna
2007 42' Phenix
Peoria Arizona

Re: Oil change

Reply #40 –
Not sure exactly how that works but that sounds like a whole latta oil for 8k miles.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Oil change

Reply #41 –
Quote from: Kurt –
Wantabe posted about the Cummins Centinel System.  We actually have that on our coach (previous owner had it installed).  The selling points from Cummins are the oil gets changed every 525,000 miles and filter gets changed every 75,000 miles.  Filter was just changed so I'm good to go for awhile.  We've put about 8,000 miles on her so far and I've added around five gallons of oil in that time.  There is a large reservoir on the left side of the engine compartment, just inside the door, that I would guess holds six gallons or so of oil.  There is a sticker on the engine that says to check the oil level every day.  It has always shown right on the full line.

My great big oil pan was put up in the attic of the garage :-)

Sounds like a good system, 5 gal every 8000 miles is same cost as oil change every 16000 miles.
And you don't have to change the oil or pay someone to do it!

Cummins QuickServe Online
Jim C.
coachfree, previous 1997, 1999, 2000, and 2003 Foretravels.

Re: Oil change

Reply #42 –
John44,

It puts the "used" oil in the fuel to be burned as Wantabe posted.

Paully,

I just posted that I have the system Wantabe referred to.  I have no idea how much he knows about oil...
Kurt & Shanna
2007 42' Phenix
Peoria Arizona
 

Re: Oil change

Reply #43 –
Quote from: wantabe –
all the specs I have seen on small engines say not to use synthetic oil for break-in. the molecular strands of the synthetic are longer and the rings
Quote from: wantabe –
all the specs I have seen on small engines say not to use synthetic oil for break-in. the molecular strands of the synthetic are longer and the rings will not seat (wear in) correctly.

Does this not speak volumes about wear after break-in. Are we debating if it's a superior lubricant, which I believe it is, or just worth the cost? Flushing my newly aquired ored with dino oil and then I will switch to synthetic to keep from coking the turbo bearings. If it develops small leaks can I really blame it on the synthetic because it's too pure? Or did it just expose then?
Old Phart Phred, EIEIO
89 GV ored 36' #3405 300 hp cat 3208 ATAAC side radiator, mountain tamer exhaust brake