If you are talking about oil for your 1943 Johnny B I would use the John Deere 15W-40 Plus 50 Synthetic Blend or 0W-40 Plus 50 Sythetic. I use the 15W-40 Plus 50 in my 4410, Cummins, Sea Ray, and Nissan. Works good and was a bargain at $284 for a 55 gallon barrel. Came out to something like $1.29 per quart. Chevron makes this oil for John Deere. I would imagine that one of the major petroleum companys makes the oil for Lucas as well and they add their additive package.
I think there is a lot of marketing that goes into oils and you can buy all the major brands and types at Walmart for the best price unless you buy in bulk like I did. The John Deere stuff is nice but not at full MSRP. Shell make a great 5W-40 synthetic Rotella T that you can get at Walmart as well.
Funny you should ask about Lucas. One of my employees swears by this stuff called "Lucas oil stabilizer" Every thing he owns is junk. In fact his car is an ex taxi cab. And he dumps that stuff in every thing he owns. Including his old Noma riding lawn mower.
I think if you keep your oil changed and put in a good oil you don't need to add any thing to your oil. The only time I used additive in my oil was years ago I put 3 cans of STP in a car to quite down a rod before I traded it in.
Originally posted by dixonman I haven't used the oil treatment but use the fuel treatment. Every time I need fuel for my 4 cycle equipment I'll add one or two oz and some stabilizer and everything seem happy so far.
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