I know this topic has been addressed here and on other forums in the past but with the ever changing formulas and government bans on some additives I'd like an update.
My 1999 Lx665 manual recommends diesel rated 10w30 motor oil in both the engine and hydraulic system. I bought the machine used and was told that the hydraulic system was likely filled with "hydraulic fluid" (no type mentioned) since they use it in most all their heavy equip. The other day I blew a hyd. line so I have to add a lot of fluid. After lots of reading and seeing the high price of diesel rated oils I decided to still use universal tractor hyd. fluid (J303) again. Now I learn that my state and others prohibits the sale of it. This is because the NH standard it was based on is long gone and not updated. It's been about 5 years since that happened but I bought a bunch on sale back when so I wasn't aware.
After researching more I figured I'd just use Rotella 10w30 T4 motor oil since I already use the 15w40 in the other diesels. Oddly, the 10w30 is less available and much more expensive when you can find it.
For those in my situation, what modern fluids are you successfully using in your machines. Some say the best choice is 20w hyd. fuid but opinions vary. My NH dealer sees no issue with using hyd. fluid but can't recommend a specific weight.
My 1999 Lx665 manual recommends diesel rated 10w30 motor oil in both the engine and hydraulic system. I bought the machine used and was told that the hydraulic system was likely filled with "hydraulic fluid" (no type mentioned) since they use it in most all their heavy equip. The other day I blew a hyd. line so I have to add a lot of fluid. After lots of reading and seeing the high price of diesel rated oils I decided to still use universal tractor hyd. fluid (J303) again. Now I learn that my state and others prohibits the sale of it. This is because the NH standard it was based on is long gone and not updated. It's been about 5 years since that happened but I bought a bunch on sale back when so I wasn't aware.
After researching more I figured I'd just use Rotella 10w30 T4 motor oil since I already use the 15w40 in the other diesels. Oddly, the 10w30 is less available and much more expensive when you can find it.
For those in my situation, what modern fluids are you successfully using in your machines. Some say the best choice is 20w hyd. fuid but opinions vary. My NH dealer sees no issue with using hyd. fluid but can't recommend a specific weight.