Ok. My take FWIW. My van is ‘72 plate (Y22) registered. I bought it new. At first MD service (BTW I had oil changed with OEM spec at an indie after 12 months just cos it’s my van and I love it) at two years old and about 10K mikes when I dropped it off for service I was ‘advised it’s recommended to have the BF changed’. As an Engineer and someone who deals with Engineering Contracts and Site Management, I asked “is it MANDATORY to validate the warranty?” The flat reply was ‘No’. I said I’m happy for you to test it for particulate contamination and water content then if it’s out of spec by all means go ahead and change it. I’ll happily pay 0.25 of an hour labour to quickly test it. ‘Errrrrrrr…….we don’t do that we just change it’.



. So….if it doesn’t need doing it’s a waste of my money, materials, and produces waste that then has to be processed. Neither economic or environmental sound practice.
So I declined.
It’s just a money spinner. I’ve since had the fluid tested and A ok.

Mines out of warranty this November but not due a MD service till next November. From now I’m going indie so I’ll have the Fluid changed at the next indie service.
It reminds me of when I had my new Golf R in ‘17. “Oh….we recommend a haldex service on the rear…..” but again not required for warranty. As they just dropped the oil and didn’t even clean the internal filter gauze which takes about 30 mins to do…..you guessed it I went indie.
Personally I wouldn’t worry. But I do appreciate it’s a personal choice. Just my experience
Edit to say just had my MX5 ‘23 Reg just had its second service and part of that included a BF change. I could have opted out but Mazda are quite firm you the invalidate the warranty. So for the sake of about £130 extra I obviously did it as I’ve got another year of warranty to run.
You just need to weigh up the pros and cons for you as an individual vs how long you’ll keep the van and your proposed future approach to servicing.
