Has anyone tried an oil-based rust treatment like NH Undercoating? Claims to convert rust and bind with the underlying steel. Apply every couple years and you're good to go. I like the concept...
Protect your vehicle from rust with NH Oil Undercoating® – the trusted name in eco-friendly, oil-based undercoating and rust prevention. Extend the life of your car or truck with our proven rustproofing solutions.
nhoilundercoating.com
Slow reply I know, I haven’t been following this thread. I’ve been using this exact stuff the past two years since I moved to NH. Seems like it’s held rust in check so far I’ll have to report back in a decade.
I bought the truck at 135k after it had been in IL and MN it’s whole life. I was real pleased to find a rust free truck locally.
Then I moved to OR and every time it would see the dealer they’d comment on how bad and rusted out it was, cautioned me that every service would take twice as long. They tore my speed sensor boot trying to pull it from the hub and wanted to charge me for a new one. (I thought this was pretty basic - never pull a speed sensor unless you’re planning to replace it! Always unplug and unclip from above! I was pretty annoyed.) But then I started seeing all the 20-30 year old Toyotas around with showroom undercarriages. Changed my mindset.
Standards of care and maintenance shift completely when you don’t accept a 10 year/100k mile lifespan as an inevitability. What’s the point of pm if a vehicle will rust out in less than a decade? And then without pm, vehicle lives are shortened and expectations lessened. Growing up in the northeast, we knew vehicles had a short limited lifespan, never invest more than necessary to keep it running because it could go at any time.
Living out west altered my expectations and also made me paranoid of any rust. I dump a lot of money into pm now, hoping this truck will last years longer. I also will spray the piss out of it every fall with oil undercoating, something I never worried about previously.
re: NH Oil Undercoating
It definitely seems like it gets in everywhere, the truck is grimy underneath all the time. I get the clear one instead of black so I can see any developments under it but it gets so filthy that I still can’t see through it. Oil oozes out between my body panels and it’s hard to keep it clean. But so far, no new rust. I do have heavy surface rust on my sliders, etc where they don’t really spray but I figure I’ll need to touch those up anyway. In winter especially I try to stick to the back roads as much as possible. Makes for better driving anyway, and I hope less salt.
Edit: I tried to take some photos just now but there’s a ton of mud underneath from my drive yesterday and the photos don’t show anything. I can get some soon in case anyone’s interested.