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Message: <blockquote data-quote="tech.35058" data-source="post: 111927" data-attributes="member: 14347"><p>in another thread, I see substitution of 10w30 motor oil suggested as a replacement for iso68. I really try to "use the right stuff" but the iso stuff is kind of obscure yet, ( & there fore "special", so pricier here) Is the iso68 "better" or is the commonly available motor oil an "upgrade"? If mixed, is there a compatibility issue? . My LX865 specifies "(10w40 motor oil)" in the hydraulics tank. My Mertz/Boxer specifies Dexron in early s/n, but ISO68 in the higher s/n, with the caution not to mix the two as it will damage the machine. ( so if I switch aux hyd attachments, I really need to flush each time? ) currently, I can purchase the iso68 oil at around $22/gallon in the 2 gallon jug locally, 10w40 is about $11/gallon in 5 gallon pail. I find where I can order ISO68 on internet (Ebay) roughly $12/gallon in 5 gallon pail. . . Since neither of these machines have "wet brakes" ( Well the 865 might, but it specifies plain motor oil) that is not an issue here. Has any one looked at the specs on this issue? Thanks, CE</p></blockquote><p></p>