Bull 34 #1 Posted April 5 Hello Everyone, I have been using Castrol GTX 10w/40 for my transmission oil in my 417A. I was wondering if going to Castrol 10W/40 synthetic would be okay since I picked it up because there wasn't any regular 10W/40 at the parts store. Regards, Bob 1 Share this post Link to post Share on other sites
JCM 10,011 #2 Posted April 5 I have always used 10-30 non synthetic in 3 of my Eaton 1100 hydros year round for 20 + years in Maine and Mass. No issues. Share this post Link to post Share on other sites
squonk 42,433 #3 Posted April 5 Synthetic won't hurt it. I run Mobil 1 10/40 1 Share this post Link to post Share on other sites
WHX?? 50,610 #5 Posted April 6 I'll third that ... They say syn is better in winter but I didn't notice any difference. Share this post Link to post Share on other sites
JCM 10,011 #6 Posted April 6 It's a Wheel Horse not a Lamborghini, stop overthinking it. Synthetic in a WH How many idiots NEVER change engine or tranny oil and never had issues over the years. RUN IT. @WHX?? 1 Share this post Link to post Share on other sites
WHX?? 50,610 #7 Posted April 6 5 minutes ago, JCM said: RUN IT. Like ya it?? 7 minutes ago, JCM said: NEVER change engine or tranny oil True ... I change it once at new to me then that's pretty much it. Some just don't get run alot. 1 Share this post Link to post Share on other sites
Brockport Bill 1,821 #8 Posted April 6 what's your insights on mixing conventional/standard oil with synthetic - - into either the engine or tranny??? or what's labeled "blended? Share this post Link to post Share on other sites
kpinnc 13,627 #9 Posted April 6 28 minutes ago, Brockport Bill said: what's your insights on mixing conventional/standard oil with synthetic - - into either the engine or tranny??? or what's labeled "blended? Won't hurt anything. Just use the same weight. They are compatible, so it makes no difference. 1 Share this post Link to post Share on other sites
