[Kev0607]

You'd be best phoning and giving them your reg to be sure.

How many drain and fills are you planning on doing? 8 litres will be enough to do two, but you won't have enough to do a third.

Simply draining it once and filling it back up again isn't going to do a lot. You need to do that a few times to get cleaner fluid. Depending how bad the fluid is, it could need doing 3 or 4 times, or if really bad, maybe even more than that.

At your mileage though, I wouldn't think it would be too dirty, but you only have enough fluid to do two drain and fills.

I guess you could see how you go doing the two drains, then buy more fluid to do it again if needed at a later date. Just don't attempt to do a third drain and fill with only 8L of fluid because it isn't enough.