DonTom
Well-known member
Here it is.Now what/how the Mobile-1 20K mile guarantee works I would read what it says on their website.
-Don- Reno, NV
Here it is.Now what/how the Mobile-1 20K mile guarantee works I would read what it says on their website.
You can hear all kinds of experts. But reality is detergents in oil do not work like some kind of solvent cleaning or sanding down your engine. That made me laugh I am sorry. Now I have this vision of little oil drops running around in the engine with scotch brit pads.I recall hearing somewhere is you do NOT want the detergents to be too good. They can cause engine wear. Some say changing the engine oil too often can also cause engine wear because the detergents are strongest in new engine oil. Kind of sands down your engine parts by the overcleaning.
Well dough! You see it is still limited to a one year time period. That should show you how few strictly oil related failures happen now days. seriously little drops of oil like the animated commercial for Dow Bathroom Cleaner with Scrubbing Bubbles.IMO, the 20K mile thing on Mobile One is just marketing BS they put on the bottles to get people to buy it.
Now think about how all the garbage gets cleaned off the engine parts to get into the engine oil.What they actually do is keep contaminates in suspension till they can be removed by the filter or by changing the oil.
I've spent a number of years cruising all kinds of automotive and motorcycle forums. At this point, I doubt that there are two people in the whole world who agree on anything that has to do with oil.Really, I have no opinion on any of this. I am no expert. But I wonder if we can even find experts who agree when it comes to engine oils.
-Don- Reno, NV
Like I said it doesn't get to settle out on the engine parts. Any "cleaning" on a improperly cared fore engine comes from hydraulic scouring. I have had hi mileage engines apart that were as clean inside as one just assembled and run on a test stand. Must be those Scrubbing Bubbles.Now think about how all the garbage gets cleaned off the engine parts to get into the engine oil.
Me? I use Mobil 1 in both the coach and the Jeep. High mileage oil in the Jeep, because it's pushing 199,000 miles, regular M1 in the coach because it's got like 45K on it. I change it at 5000 miles(or once a year on the coach).
This is true there are so few that have had any real training/education on the subject. Most are repeating in accurate outdated information.At this point, I doubt that there are two people in the whole world who agree on anything that has to do with oil.
There is a chart in this thread that shows how to read your VIN to determine month and year of build. https://www.rvforum.net/threads/split-date-rvs.135546/The only way you will know when your chassis was built is ti run the VIN. Mine is a 2016, house built in 3/16 purchased in 6/16.
I guess my (20+ years of) professional experience in the automotive repair field passed by you, the last 5 of those years spent in a dealership working on brand new modern vehicles. I've seen it first hand. You change your oil 10K or more miles, you're going to have problems later down the road from sludge build up. Especially if its an engine that has variable valve timing. It doesn't matter whether its "dino oil" or full synthetic, it still breaks down and turns to sludge and grimes up your engine if you don't change it regularly, and that does not mean 10,000 miles or once a year.Ok but what you are talking about applied to your Grand Father's car not current production. The same goes for the oil. Actually regular dino oil has come a long long way. The additive packages' are realey good now days. Ok you are saying "what does this guy know" Well I use to be certified in oil analysis and ran a oil lab when I was in the AF.
I do run a full synthetic oil in my little camper.
Bill
So, that's 50+ years of experience between us, and we're both saying the same thing.I guess my (20+ years of) professional experience in the automotive repair field passed by you, the last 5 of those years spent in a dealership working on brand new modern vehicles. I've seen it first hand. You change your oil 10K or more miles, you're going to have problems later down the road from sludge build up. Especially if its an engine that has variable valve timing. It doesn't matter whether its "dino oil" or full synthetic, it still breaks down and turns to sludge and grimes up your engine if you don't change it regularly, and that does not mean 10,000 miles or once a year.
I can understand perfectly and it has nothing to do with the cost, it's the hassle.I just don't understand why someone would pay $100,000-$300,000 plus for a coach and then cheap out on the oil changes.
I agree I also spend the time to inspect everything and lube/grease everything. If I was worried about money I wouldn't be using in excess of 10 gal Shell Rotella T-6 of full synthetic oil per change.What I don't understand is why everybody thinks everything is about money.
FWIW, I would do my own oil change even if it cost ten times as much to do them myself.
A lot of the modern engines that I've torn apart (for reasons not pertaining to sludge) have had a lot of sludge residue, not full on sludge, but there is build up forming in the crevices. This is where the problem starts with extended intervals and that build up also gets into the tiny pin-hole sized galleys (like the galleys used for oil delivery to variable valve timing components). The entire engine doesn't need to be sludged out to cause failure. All it takes is one little glob in the right spot to cause a failure. I'd say that 90% of variable valve timing issues are due to sludge build up in the solenoids (which have fine screens and baffles) and in the oil galleys for those components.I'm not a proponent of lengthy extended intervals, but sludge has to be a fairly rare occurrence in a modern engine, at least in the first 100k or so miles. In my mind, it's probably indicative of some sort of abuse or hard-use conditions. Based on the reports of the experience mechanics here, there must be more of that happening than I would have guessed! I shouldn't be surprised at what some people will do to destroy their valuable possessions, but I still am. In my late-model gas vehicles, a 7000 mile oil change is likely to show oil that isn't even black yet. And my diesel oil was black but still clean (and that was a 2004 vintage engine). Yes, I do change my own oil and look for the presence of sludge and foreign gunk. Like many others here, I highly recommend it.
Is that because of the high compression causing more blowby? And is that the main reason diesels need a couple of dozen (or so) quarts of engine oil?Diesel oil, once put into the engine and ran, will always appear black, even right after an oil change this is normal.
What oil were they using? How often were they changing it? Was it the oil recommended by the manufacture?A lot of the modern engines that I've torn apart (for reasons not pertaining to sludge) have had a lot of sludge residue, not full on sludge, but there is build up forming in the crevices. This is where the problem starts with extended intervals and that build up also gets into the tiny pin-hole sized galleys (like the galleys used for oil delivery to variable valve timing components). The entire engine doesn't need to be sludged out to cause failure. All it takes is one little glob in the right spot to cause a failure. I'd say that 90% of variable valve timing issues are due to sludge build up in the solenoids (which have fine screens and baffles) and in the oil galleys for those components.
Not that there is more blowby, its because diesel fuel is dirty and sooty so the blowby contains soot which gets into the oil. The reason why they take so many quarts of oil is because of engine size, turbo charger and oil consumption. Every engine burns oil, even brand new engines, and increases as the engine ages/wears. Also, diesel engines, even in trucks and motor homes, are huge. A Cummins 6BT is about 900 lbs with no fluids in it. They need to have an adequate oil supply to pump oil all through out the engine and into the turbo bearings as well.Is that because of the high compression causing more blowby? And is that the main reason diesels need a couple of dozen (or so) quarts of engine oil?
-Don- Reno, NV
They were dealer maintained vehicles, as I worked in that dealership. Generally, can't say for certain without service history, but it is done at factory interval of 5-10K miles, with factory recommended fluids. It was a Nissan dealership, so it was "Genuine Nissan Engine Oil" (ExxonMobil products.)What oil were they using? How often were they changing it? Was it the oil recommended by the manufacture?
My oil filler tube has about two inches of clearance to the top, and way in the upper rear of the hood. I don't think anything other than pumping it in with a tube is possible.I either have to buy all the oil in quart bottles,