coobie
Super Member
- Joined
- Sep 19, 2004
- Messages
- 6,427
- Location
- S.Michigan
- Tractor
- Kubota RTV 1100c, JD 740,Kioti DK 40 with KL401 loader .
I know the owners manual calls for 15W-40 oil but I want to switch to 5W-40 full synthentic.Will switching to 5W-40 void my engine warrenty?I have around 30 hours on my tractor now but would like to switch over at my 50 hour service.Thanks for any info.coobie