Rust prevention.....

[Scania]

Having just had my 16 year old Volvo MOT’d the tester advised that I got some rust prevention treatment applied to the underside of the car,although this wasn’t listed as an advisory as such, something akin to oil spraying, just wondering if there’s a better option other than just using old oil (as I have done so in the past albeit on a different car) , he said there’s nothing worse than surface corrosion but treatment now will significantly prolong the life of the old tank.

Any recommendations appreciated.

 

[Scania]

It’s probably waxoyl he was on about

https://www.hammerite.co.uk/product/waxoyl/

Actually, he specifically warned against Waxoyl, I immediately suggested using it and he advised against as over time water gets behind the waxoyl and rust starts to form unseen, by the time it's an issue, it's too late. I had an old '84 XR3i that had been wayoyled from new - which was such a selling point back in the day - and it passed every MOT with no corrosion issues, then came the day it turned out it was actually riddled underneath , neatly hidded by the layers of black stuff....

@VaderDSL I've seen that stuff used on commercials, swaying towards this option, thanks.

 

[Scania]

I’m the end I changed the car - for another V70 - in its service history it mentions rust prevention applied in 2012 which maybe needs refreshing if that’s a thing, I have no idea what it was treated with though.