I'm going to replace the (5 speed) gearbox oil while I've got the 420R in bits. As with many things, this has resulted in a bit of a dilemma.
My owners manual says the following;
- 5spd All models exc 160/165. COMMA EP 75w80 GL4
- Caterham 6spd COMMA EP 75w80 Mineral GL 4
That seems simple, however, with my kit, CC sent mineral as shown. So I'm left wondering what to order? Any recommendations, as mentioned its the Mazda 5speed. Thanks