Do you know your car's MoT and mileage history? Our user profiles will show you for FREE | No thanks
Ask a Question

Will an OAT antifreeze cause problems with my 1978 MGB?

My 1978 MG MGB had an engine rebuild six months ago. An OAT antifreeze was put into it. I have read that this may cause a problem to older engines (water pump seals, gaskets, some solders and metal bearings). Is this likely to be a problem for my engine and should I have it changed for a silicate antifreeze?

Asked on 6 March 2017 by John Serenyi

Answered by Keith Moody
As a rule of thumb, cars built before 1998 generally do not need an OAT-based antifreeze. Speaking from personal experience, I would recommend keeping it old school and using an anti-freeze that is non-OAT based and therefore does not contain silicate.
Similar questions
I hear a gurgling sound in the dashboard of my Volkswagen Passat and I'm losing antifreeze. I don't see any leaks. Do you know what the problem could be?
I have a 2007 Jaguar XJ 3.0-litre V6 with 44,000 on the clock. Jaguar are saying that the engine coolant needs replacing at this service and are quoting over £100 to do it. When should the coolant be replaced...
Is it true that antifreeze needs be changed at intervals these days.

Ask Honest John

Amount to borrow
Sorry. The minimum loan amount is £1000
To pay back over

My credit score

Best available rate 9.20%

Total repayment £9,304.93

Total cost of credit £1,804.93


60 monthly payments

Apply now

Representative example

The Representative APR is 13.2% (fixed) so if you borrow £7,500 over 4 years at a rate of 13.2% p.a (fixed) you will repay £199.21 per month and repay £9562.20 in total.