Oil undercoating

[livwell]

Heard about a few old timers at work that they
spray the frames and rockers of there vehicles and trailers with motor oil?? I was wondering if other people do this or heard of it ? what type of oil you use and does it really work.. thanks for any info

 

[Bluedodge]

Used moter erl in a lawn squirtin' pump up gallon juggy thing.
Next qwestion.

 

[Richard Cranium]

that's a new one on me.

 

[Stuart in MN]

Yup, they used to do that a lot in the old days. The idea is you spray or paint on old oil saved from oil changes, then go drive down a gravel road. The dust will cover the oil, and create a gummy barrier on the underside of your car. Don't know if it really worked that well or not, though, or if it just created a gummy mess.

 

[Super Mech]

Some people add bar and chain oil to make it stick better. Always wanted to try this on my plow trucks but never got around to it.

 

[Boilerhouse]

I live in a salt belt. I spray a commercial, oil based, undercoating product every fall. I own my vehicles for 20 years, or more. I think it works only because it seems logical to think this. To know for sure I would need to buy 2 identical cars, undercoat only 1, and then drive them under identical circumstances for several years. Only then would I know if it is worth it or not.

 

[Tractorsellr]

I coated my trailer boards with used diesel oil years ago. I do not have treated lumber on any of the 4 trailers I own. It takes a lot of oil to soak the boards thru. The oldest trailer I have was made in 1989 and it still has the original oak boards. If the boards ever rot I will not treat again with oil, but replace with pressure treated lumber. Oil can get a little messy when hot.

 

[Dragfluid]

While growing up on the farm, dad used to pour used oil on the hogs.

Thinking back, I don't think that was a good idea, either.

 

[johninct]

It works very well and takes maybe a little more than a quart to do a vehicle. I find that my sprayer works much better if I buy a quart of new cheapest engine oil I can find.

 

[yhprum]

The used motor oil and dirt road trick was common up in Canada when I lived there. you could tell it was autumn by the oil dripping off cars. Effective but messy.

 

[nine4gmc]

I have a vintage Binks Oil Spray Gun made just for this.

 

[zoomzoomjeff]

I have a POS Jeep that does this automatically! LOL. Front main seal leak, oil pan leak, trans pan.

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[Hilltopmasonry]

Basically the same thing as using fluid film without the environment concerns, oil repels water. I know people that have used oil for years and it worked great

I am a huge fan of fluid film.


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[coljar]

I have British cars. They oil everything underneath.

 

[jomobco]

I just finished doing my 2500 in LPS 3. Basically a paraffin suspended fluid which coats in a wax.

 

[jsaw]

Black dirty oil drained from a diesel seems to stick better than thinner oil. F you ever tred to wash t off your hands, you wll understand. 90wt gear oil sticks also, but smells bad for a while. After you spray it, drive on a dirt road. The dust sticks to the ol and makes a good coatng. Also it probably might drip for a whle after.

 

[theoldwizard1]

Fluid Film is the modern equivalent.

I might do just the inside bottom door edges of my new car.

 

[SMKS]

Fluid Film is the way to go.

 

[skippydoo]

Fluid Film is the way to go.

DO NOT USE FLUID FILM ON A CHEVY OR GMC VEHICLE FRAME! Fluid film will melt the was coating off the frame and its bare untreated metal under the coating. Using it on painted surfaces is fine. Anyone with a GM vehicle and looking for the product they use to coat the frames, google daubert nox rust x-121b.

 

[1969]

People been doing this type of thing for years, atf and bar oil, 50/50, mix, spray.

 

[Bruce Amacker]

An "old timer" told me this in the mid- 70's and I've done it ever since. I also live in the salt belt and it will make anything last virtually forever. New or used oil doesn't matter, new oil makes less mess if it drips. Do it in about September/October on a dry day, not after driving in the rain. Stay away from the exhaust or it will stink badly. Go easy on the wife's car or she might complain about the odor for a while. If you go overboard park it in the gravel for a couple of days to drip, if you spray a light mist this won't happen. An undercoat gun works best for application, I usually use new 5w30. I've drilled the doors to spray inside or put oily rags inside them. Rub grease on the botttom of the oil pan. After doing this a couple of years you won't need to spray much, but your brake/fuel lines will look like new after decades. I use spray grease on the ground cable and battery cables on the starter.

 

[TTTTTT]

Yearly undercoating common in Canada especially in heavily salted winter roads. Many commercial operation s like Rustcheck or Krown and other cheap garage ones that use used motor oil. I get the commercial one. A thorough application also punches a very small holes that are plugged with a cap after that get into all the panels and cavities. Helps for all electrical connection and boots also. NOT used oil for this but a proven system. Rustcheck usedto have a click radio sitting in it submerged working perfectly to prove the point. Keeps corrosion out. I do it on all my vehicles. My one truck 20 yrs and 465,000 km , not a spot of rust anywhere through salty winters.

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[lilredex]

My method is an approx. equal mix of old ATF, Varsol, and disolved wax toilet ring seals, sprayed with the gun shown. Its nozzle fits in a 1/2" hole. You have to do it regularly to be effective. It does not last long in wheel wells either, where it faces serious tire spray. If you look up WAXOYLE you will find addition DIY solutions.

 

[LS1-IROC]

DO NOT USE FLUID FILM ON A CHEVY OR GMC VEHICLE FRAME! Fluid film will melt the was coating off the frame and its bare untreated metal under the coating. Using it on painted surfaces is fine. Anyone with a GM vehicle and looking for the product they use to coat the frames, google daubert nox rust x-121b.

I use Fluid Film on my 2011 Silverado with no "melting" of the factory applied coating. Works awesome actually.

 

[mrrooG8]

DO NOT USE FLUID FILM ON A CHEVY OR GMC VEHICLE FRAME! Fluid film will melt the was coating off the frame and its bare untreated metal under the coating. Using it on painted surfaces is fine. Anyone with a GM vehicle and looking for the product they use to coat the frames, google daubert nox rust x-121b.

Ummm not true. It was not the factory coating melting off from Fluid film. It was the **** factory method they used to apply the coating. They did not clean the frame and the factory coating was peeling off very quick. Worked for Gm for 14 years...

 

[Jeepster04]

Fluid Film is the way to go.

Ive been coating the underside of my vehicles for a few years now. Seems to have slowed down/stopped rust altogether. Bought the kit with the hoses n such to do the inside of the frame.

 

[KEH]

My first new car was undercoated though I'm not in the salt belt. Haven't bothered since, but I wonder if undercoating will deaden the road noise from out rough roads.

KEH

 

[Ole Slewfoot]

all my Automatic cars have done this, but especially the Dodge.

 

[SMKS]

Yearly undercoating common in Canada especially in heavily salted winter roads. Many commercial operation s like Rustcheck or Krown

The problem is that many of us don't have access to things like this.

I'm currently on the edge of the rust belt. Cars do rust here, but there aren't places that do oil-based undercoating. I'd probably just get Krown or Rustcheck if any places here did it, but I've looked and no one around here really offers anything like that.

That's why Fluid Film is such a good choice, because it's affordable, pretty effective and easy for a DIY'er to do.

My experience has been that with FF, it's a good idea to do an annual touch-up of the high-spray areas like wheel wells. It's lasted quite some time on other areas when I've used it.

 

[Ilikeike]

This doesn't sound EPA friendly.

 

[Seagoon]

I have no personal knowledge, but I was told that using old engine oil is not a good idea because of the acids that collect in the oil from combustion blow-by.
New oil of course has no such problem.

 

[SMKS]

This doesn't sound EPA friendly.

I'm not sure if you're joking, but this is actually another benefit of Fluid Film. It's non-toxic. It's based on lanolin, which is the grease from sheep wool.

 

[TractorJeff]

2 things
First is back in the early 70's a couple of guys tried the used oil trick on pickup trucks in upper New York State. Their opinion was that the tailgates and boxes rusted out faster! It was later discussed by others and the determination was the Acid in the Oil due to pre-EPA friendly cars.
Would it work now with used oil? Probably, Maybe?

Second is Oil on Pigs, probably not the best oil to put on a pigs skin but pigs actually need mineral oil or whatever it is I can't remember(?) applied to their skin as they have no natural way to keep their skin moist and will get sun burnt chapped skin. There is a roller device sitting in a tub of oil that is used for pigs kept outside to rub against. GOOGLE "Hog Oilers"

Forgot about the "EPA Friendly" comment!
LOL!
Its probably because there are some really heated discussions about what to do with Waste Oil and pouring it on the ground is not one of them! (dripping off from car)

 

[TheEquineFencer]

I have a POS Jeep that does this automatically! LOL. Front main seal leak, oil pan leak, trans pan.

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I have a Ford Ranger, PS fluid does the same thing....

 

[TheEquineFencer]

I'm not sure if you're joking, but this is actually another benefit of Fluid Film. It's non-toxic. It's based on lanolin, which is the grease from sheep wool.

Damn, we have sheep here on the farm....maybe I could just run over a few and then drive back over them every few days to recoat....? Guess what I think of the sheep? BTW they're "dog toys"....

 

[skippydoo]

Ummm not true. It was not the factory coating melting off from Fluid film. It was the **** factory method they used to apply the coating. They did not clean the frame and the factory coating was peeling off very quick. Worked for Gm for 14 years...

I did my 11 Gmc as soon as I drove it home from the dealer and coated everything with FF. My wife got a Gmc a week before me and I didn't do her vehicle. After I saw what was going with my frame, I looked at her car and no issue. I then sprayed about a 4 inch circle on her car's frame and within 6 months the factory coating failed and the metal was rusting. I called FF and they said some frame coatings are affected by Fluid film. Sad when you go to a GM dealer and brand new truck frames are already rusting in several spots. For the cost this is total BS!

 

[lilredex]

2 things
Forgot about the "EPA Friendly" comment!
LOL!
Its probably because there are some really heated discussions about what to do with Waste Oil and pouring it on the ground is not one of them! (dripping off from car)

When travelling around the U.S. south, I've noticed a dark blue streak in the center of a lot of the paved roads....it has to be drippings from motor vehicles. It is probably everywhere, but in the south there is no winter weather to scrub it away.

 

[WVBrady]

I have no personal knowledge, but I was told that using old engine oil is not a good idea because of the acids that collect in the oil from combustion blow-by.
New oil of course has no such problem.

I had a neighbor who used old oil to undercoat his truck. He said that used oil worked better than new. He claimed that if you took two pieces of metal and coated each one with one type, the one with new oil would rust and the other would not. The only reason I could think of was that perhaps the acid in the used oil would act like phosphoric acid does in the rust converters and change the rust to a more stable form like phosphate.

 

[WVBrady]

The advantage of Fluid Film over motor oil is that it is not supposed to be harmful to rubber hoses and bushings.

 

[landrover bodger]

it was normal here in the 70s do an autum oil change and spray the old oil under car . it helps prevent rust just look at an old land rover plenty of oil leaks . oil sprays over front half of chassis a bit of rust back half little oil spray plenty of rust .