What Oil are you using

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What Oil are you using

Postby Berger » Tue Sep 18, 2018 8:48 am

Hi All What oil are you using in your Lehmans? 30W, 40W, 10W-40, Delo, Rotella?
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Re: What Oil are you using

Postby Charlie0 » Tue Sep 18, 2018 12:23 pm

Rosella 15-40 will cover all of the requirements.
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Re: What Oil are you using

Postby Tom H » Tue Sep 18, 2018 1:18 pm

I have always used Rotella T1, 30wght. in my twin Ammarines as well as my 9kw Onan gen set.
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Tom Hansen
1976 42' GBC #482
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Re: What Oil are you using

Postby 2Bucks » Tue Sep 18, 2018 1:23 pm

I use either Rotella or Delo (whichever is on sale) straight 30 weight in my Lehman. Multi weight oil seems to get used by the engine faster than the straight weight. It is getting harder to find straight 30#, but WalMart online has it and will deliver to your house for a pretty good price. It's seldom available in the WalMart stores or even the farm and garden stores.

Depending on which Lehman engine manual you have you'll find either straight weight only recommended or straight and multi-weight recommended. Bob Smith in his seminars used to say that either was OK to use.

Ken
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Re: What Oil are you using

Postby Tom H » Tue Sep 18, 2018 4:11 pm

NAPA has all the Rotella T1 I need. Less than $90 for 5 gallon pail. One gal jugs are also available at a proportionate price.
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Tom Hansen

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Re: What Oil are you using

Postby FrugalWife » Wed Sep 19, 2018 10:22 am

Rotella T4 15-40 ... seems like an incredible consensus on oil brand!
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Re: What Oil are you using

Postby Charlie0 » Wed Sep 19, 2018 1:46 pm

Tractor supply periodically has sales on Rotella. 2. 5 gallon containers. Very handy size.
Charlie O
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Re: What Oil are you using

Postby 2Bucks » Thu Sep 20, 2018 7:52 pm

https://www.walmart.com/ip/Shell-Rotella-T4-HD30-Diesel-Motor-Oil-1-gal/107471534

$73.20 for 5 gallons, delivered to your home.

Ken
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Re: What Oil are you using

Postby Rod Graff » Fri Sep 21, 2018 11:29 am

We switched to Delo 100 40 weight. Seems to have less consumption, plus we can buy it in bulk at a local distributor. This was made for the old two cycle gray marine engines, and works well on older Diesel engines
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Re: What Oil are you using

Postby Sangraal » Fri Sep 21, 2018 12:56 pm

I think you will find the Lehman should use a single weight oil. I use a Rotella 30W.
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Re: What Oil are you using

Postby Chesapeake » Fri Sep 21, 2018 1:09 pm

Delo 400, 30 wt. in 1971 FL 120 2714's. I've used Rotella also and can't tell any difference. The 1923 Atlas imperial and 1932 Washington Estep I work with sometimes use Delo 400 40wt.
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Re: What Oil are you using

Postby Tom Overs » Mon Sep 24, 2018 11:15 am

I've gone to a semi synthetic oil 10-40. This was recommended by my oil technician.

Let's be objective about oils..... Since the engine was developed oil has changed beyond anything that was available in 1950s and today no manufacturer would specify a single weight oil.

If your happy with a single weight that's good, but personally I now feel that there are other options.
Tom.
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Re: What Oil are you using

Postby Rod Graff » Wed Oct 03, 2018 12:55 pm

I would not switch from mineral to synthetic or semi synthetic oil on an old engine. There have been issues with leaking rubber seals. Since I switched to the heavier Delo 100 40 weight, I notice less consumption and leakage. 10/40 oil is 10 weight when cold. Tom, have you noticed any more leakage? I am a firm believer in using what the engine manufacture recommended Shure, everyone in the automotive industry switched to multi grades a long time ago. The newer engines are designed for it. Another reason is emissions systems and better fuel economy.
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Re: What Oil are you using

Postby Tom Overs » Sat Oct 20, 2018 4:38 am

Rod,
My engine was rebuilt and has all new seals so no problem with leakage.
On start up after changing the oil the engine sounded quieter than before, I can't explain why but it was....... That said it still sounds like a bag of spanners being rattled but it's a smaller bag.

I did this after speaking to the oil technician and up to now no problems, no increase in oil usage, in fact I don't loose any oil at all.

Personally, I wouldn't go back to a single weight and prefer the extra benefits of having a better modern day specification oil.

Tom.
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Re: What Oil are you using

Postby Hyperion » Thu Nov 08, 2018 2:02 pm

Rotella T1 Straight 30 on my Lehmans and I belive 10-40 on my Onan as called for. I'm in the tropics.
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