I bought my 7 last July, it's an S3 1998 Supersport with K series 1600 engine, 6 speed box and AP Suretrac LSD. I want to do my own servicing but would like confirmation/recommendations for the correct oils and fluids to use. The VIN p,ate on the car references oils and fluids but probably things have moved on since 1998! Coolant - Comma Xtream red. I cannot find this. Is Comma Xtream G30 the same thing? It says in the spec that the colour is violet? Engine oil, I'm proposing to use Comma motorsport 5w-50. Gearbox oil! I think I've read that Red Line MTL 75-80 GL4 is recommended for the Caterham 6 speed box? Diff/LSD - car says EP 90 but I recall reading somewhere that LSD's need a special oil? Any help would be greatly appreciated.