oil question

bjl8691

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I recently got an early 60s jacobsen 2 stroke and a 1969 lawn boy 5238 both say to use sae 30 non detergant gas oil mix 16:1 now im wondeing should I go ahead and use 2 cycle oil mixed 16:1 im just confused im used to my 80s and 90s lawnboys where its 2 cycle oil mix 32:1 or 50:1 not using sae 30 would it hurt to just do 16:1 with 2 cycle oil ? My guess is all they had back than was sae 30?
 

possum

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Guys will tell you oil has changed but I would just mix a two cycle oil at the rate they call for. I know guys who run those old outboards and they run two stroke oil at 16 to one just like they call for. I remember at the local gas station when I was a boy they sold a dual purpose oil by Quaker State. Was for two cycle outboards and 4 cycle lawnmowers. That was a big seller with the two cycle fellows.
 

cashman

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I would run a mixture like they recomended back then also. Those mowers had a lot more sloppier internal tolerances than they do today and they had better gas back then. I remember when Shell came out with a two cycle oil. It was the same oil as 30 wt. but with a dye that you could tell if oil had been mixed with the gas. You had to keep the exhaust ports cleaned out on those old lawnboys.
 

bjl8691

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Interesting ive never mixed sae 30 with gas before wonder if it smokes more or less than 2 stroke mixture and the lawn boy has a cork float and the jet hole seems like its big enuff not to clogg from the thinkness of the oil ill give it try not for a few days tho its 100 degrees here to hot for me
 

impalass

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I recently got an early 60s jacobsen 2 stroke and a 1969 lawn boy 5238 both say to use sae 30 non detergant gas oil mix 16:1 now im wondeing should I go ahead and use 2 cycle oil mixed 16:1 im just confused im used to my 80s and 90s lawnboys where its 2 cycle oil mix 32:1 or 50:1 not using sae 30 would it hurt to just do 16:1 with 2 cycle oil ? My guess is all they had back than was sae 30?
I think that these 2 engines don't have needle bearings so you should with the 16:1 mixture.
 

bjl8691

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Ok so basicly the motors are more sensitive than the more modern lawn boy (v, f, duraforce) etc... requiring the sae 30 mix for better lubrication?
 

possum

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No. There was a dearth of 2 stroke oils and testing standards for same in that time period.
 

bjl8691

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So your saying it dont matter I can use 2 stroke oil mixed 16:1 with out any pronlems and dont bother with the sae30
 

impalass

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So your saying it dont matter I can use 2 stroke oil mixed 16:1 with out any pronlems and dont bother with the sae30
Yes. With a good 2 stroke oil the exhaust ports will stay cleaner.
 

bjl8691

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I like using lawn boy echo and stihl 2 stroke oil
 
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