Owners manual calls for sae 30 in summer. It should be fine to use 10w-30 instead correct? Sae 30 is quite expensive compared to the latter.

Thanks
 
ya they did in 1950's. but use whatever fits your needs to the weather. there is more grades of oil out there than I have shorts.
 
(quoted from post at 02:41:00 06/04/19) Owners manual calls for sae 30 in summer. It should be fine to use 10w-30 instead correct? Sae 30 is quite expensive compared to the latter.

Thanks
It's probably fine, but when they call for 30 wt., I give them 30 wt. You can buy a 2 gallon at Walmart for pretty reasonable, and that's enough to last a long time. It can also be used for general lubrication around the shop, and makes an ok bar oil.
 
Back in the day they didn't have multi-vis oils. So it was thiner(10wt) oil in winter,heavier(30wt) in summer. These days run 10/30,or 15/40.These new oils are much better than the 'old' oils.
 
Those multigrade oils are no good. It is just thin oil with polymers as thickener. I want to lubricate my engines with oil not polymers. 30 w for me.
 
What oil is used depends a lot on where you are. I live in Missouri and I use 20W-50 year round in all but two engine. It one of the other ones I use a diesel type oil because it is a diesel and the other one I use a 60W oil but it is the oldest machine I have and may not ever have been rebuilt.
 
I didn't see what model you have but if it's gas 10w-30 should be ok as long as oil pressure is good. 30 prably would be better in summer. If it's diesel I would use 30 or 15w40. Heavier oil isn't always better because how to you know if it can get in tight tolerance fits and small holes and get thrown up
 
Well as for me in a I H gas tractor we run only the LOW ASH in the 30 weight . Yep it costs more but cheap compaired to doing a valve job due to COKING on the exhaust valves .
 
Their is nothing wrong with multi grade oils.I have a Farmall B that was overhauled in early 70s and has used Rotella 15-40 since overhauled and never had an once of problems.
 

Whatever you use, make sure it has ZINC in it. Zinc protects the camshaft lobes and the lifters. Modern multi-grade oils designed for today's cars does not have the zinc because it messes up the catalytic convertor.
 
No it is not a wives tail old engines and racing engines use it. It is also used in rebuilding an engine. Lucas and other companies sell it as an additive. I use it in my antique pulling tractors and my ford F450 super duty with the 7.5 non cat. engine.
 
I find it HILARIOUS that everyone has an opinion, but nobody has asked, "WHAT TRACTOR?"

Pretty much any oil will work on a tractor that isn't worked hard or used much. All it has to be is wet and slippery so the engine doesn't tear itself up.
 
You are talking about high speed engines with tappets, in that case yes, or with super heavy springs.

There is no evidence for the need of that oil in normal engines.
 
Anything that has flat tappets needs it and did you know that the new springs used on valves of old engines are stiffer than originals. Taking zinc out is because new engines have almost every thing running on rollers. New engines roller cam and roller rockers and in some there is no rocker the cam sets on top of valves.
 
(quoted from post at 11:58:16 06/05/19) Anything that has flat tappets needs it and did you know that the new springs used on valves of old engines are stiffer than originals. Taking zinc out is because new engines have almost every thing running on rollers. New engines roller cam and roller rockers and in some there is no rocker the cam sets on top of valves.

These tractors with weak, low RPM spring setups do not raise any concern for zddp content in any oil.

I have not seen an oil with *0* zddp content in it.
 
New oils have cut way back on zddp. Tell your die hard collectors of old cars,
trucks,and tractors that they don't need zddp and they will laugh in your face.
 
(quoted from post at 17:56:53 06/05/19) New oils have cut way back on zddp. Tell your die hard collectors of old cars,
trucks,and tractors that they don't need zddp and they will laugh in your face.

We aren't talking about trucks and cars.
 
Your antique tractors, trucks, and cars are all low rpm and low compression engines.
The only reason why you are seeing cut in use of zinc is do to the EPA.
 
(quoted from post at 22:54:20 06/05/19) Your antique tractors, trucks, and cars are all low rpm and low compression engines.
The only reason why you are seeing cut in use of zinc is do to the EPA.

I thought you said it was because of rollers.

The spring pressure on these tractors is like half of what stock springs are in a basic car rebuild. As the build becomes more conducive to higher rpm, the spring needs to become stiffer. The pressure and lift we are looking at in this case is laughable in comparison.

You won't hurt anything by adding zddp but there is no risk by not adding more than what is already in the oil. Total wives tale is right. Go ahead and spend money where you think it counts.
 

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