jimbo26967 Posted August 13, 2017 Report Share Posted August 13, 2017 Have just bought a new 4rt 260 obviously the manual recommends repsol oil as its spanish but whats everyone using in the engine and gearbox ? Quote Link to comment Share on other sites More sharing options...
basil Posted August 13, 2017 Report Share Posted August 13, 2017 Castrol power 1 10 w 30 or 10 w 40 is my choice and that of the dealer 1 Quote Link to comment Share on other sites More sharing options...
jimmyl Posted August 13, 2017 Report Share Posted August 13, 2017 There are numerous posts on this if you have a search but consensus is as above for engine or similar and the elf htx oil or atf for gearbox . typically every 6 weeks. Change engine oil filter every other oil change . 1 Quote Link to comment Share on other sites More sharing options...
jimbo26967 Posted August 13, 2017 Author Report Share Posted August 13, 2017 i see the castrol comes in semi or fully synthetic which do you use ? Thanks Quote Link to comment Share on other sites More sharing options...
2stroke4stroke Posted August 13, 2017 Report Share Posted August 13, 2017 I use a Rock Oil light gear oil in the gear box. Works well and was the recommendation of the man who knew more about the 4RT than anyone else in Britain I should think. Any good 10/40 will suffice for the motor, full or semi. 2 Quote Link to comment Share on other sites More sharing options...
jonnyc21 Posted August 13, 2017 Report Share Posted August 13, 2017 (edited) I use a high quality fully synthetic motorcycle oil 10-40 for the engine and the ELF HTX 740 for the transmission. However, I know others using ATF with good success in the transition, and if I was going to try something else for the transition I think the GRO extreme has the closet viscosity and heat ratings to the ELF but isn't available in the US. Edited August 13, 2017 by jonnyc21 1 Quote Link to comment Share on other sites More sharing options...
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