Going from synthetic to mineral oil

[Nick_Walczak]

I am told my kitcar is run on Mobil1. I need to top it up but I've heard you mustn't mix Mobil1 with mineral oil. Is the best thing to do just to do a complete oil change? Or is it more complex when you go from mineral to synthetic or vica versa?

[dgmx5]

Nick

Advice I've been given in the past for cars in general is that you can go from mineral to synthetic (full oil change not top-up) but once on synthetic you shouldn't go back to mineral again.

If you're on synthetic best to stay that way - pop down to Halfords if you need some as they've got 25% off 5W40 fully synthetic at the moment,

Cheers

[Nick_Walczak]

Thanks. :)

[Nick_Walczak]

By the way, what happens if you do sling mineral oil in with the Mobil 1?

[Jezz_S13]

Yeah what does happen.

Surely just makes semi-synth. :)

[Nick_Walczak]

I've also heard that you never need to change synthetic oil. That would be good :)

It's something to do with the molecule chains never breaking down. I saw a test years ago where they put it in a car and ran it for 200k miles without changing it. I think it may even have been a 200SX or some other Jap coupe. Anyway, they opened up the engine afterwards and it was still clean and free of sludge and whatnot.