Rust proofing options?

I stopped rust proofing cars after a dealership sprayed undercoating all over the felt in the wheel wells!!
Like that is going to rust.

No, not at all! I just do like you, good car wash once in a while… cars are much better made these days and resists well to rust, even here in Quebec province

Lon12 said:

I stopped rust proofing cars after a dealership sprayed undercoating all over the felt in the wheel wells!!
Like that is going to rust.

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Going to derail for a second, why is there felt in rear wheel wells? I have never seen that before...

I'm guessing sound insulation.

Hasenphever said:

I'm guessing sound insulation.

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Thanks, that makes sense!

Consumer reports magazine suggests that rust proofing is not a good value. Modern vehicles use a lot more plastics and other non rusting parts in under carriages. Also quality of manufacturing makes a difference and I think the Outlander PHEV is very well built. For another example, I traded my 2000 Toyota Rav4 with almost 300,000 mi on it last year and it had very little rust underneath and still had the original exhaust even though I live in the rust belt in Minnesota.

Thanks, I appreciate that point of view. However, it would still be interesting to hear what others have done for rust proofing.

Hasenphever said:

Thanks, I appreciate that point of view. However, it would still be interesting to hear what others have done for rust proofing.

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nothing for me… when I asked my dealer, he did not recommended it. I also did not give any rust protect to my previous car, and almost nothing 10 year later. so I don’t intend to put any kind of oil or whatever product on all this electronic hidden behind the body of this new car

Certainly, it depends on how long you want your car to look good & and maintain better resale value. Living here in Ottawa, where salt is still the preferred road deicer, cars rust. I always have our vehicles " oil sprayed" (not rust-proofed, which can peel and let moisture in). Before getting our 2023 PHEV, I sold a 2009 Escape (notorious for back qtr panel rust) and a 2017 RVR, which believe it or not are showing signs of rust when you see others on the road. That said, both of our oil sprayed vehicles looked a year or two old, with no rust to be found anywhere. The downside is that it can be messy, certainly for the first week or so and on really hot days.

Got my 2023 phev sprayed by krown, which is a mostly Canadian (right?) rust proofing brand that's been in the business a long time. They use thinner oil and not goopy undercoating. Supposed to not damage electrionics and jsut leave a film of oil on everything.
Did that with my chevy volt before,works fine and didn't cause any touble.
The oil film does collect dust and make the engine bay and orange cables look dirty.

As to warranty issue with krown (they do drill some holes in the body panels to spray inside of door and cavities), most people on forms I read say it's fine, and I haven't seen anyone come out and say their warranty claim was denied because of the holes or rust proofing.

Dealers will always tell you it voids warranry becase they want to sell you their own rust proofing stuff. So their words mean very little there.
My local dealer wanted to sell me the electric type rust proofing box, which is one of the more scammy options.