Is there any reason NOT to use Royal Purple Duralec SAE 15W-40 in a 1HDT?
Oil for 1HDT (2 Viewers)
- Thread starter Rumblefrog
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- 1hdt duralec oil royal purple sa
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- Thread starter
- #3
Winters here in Oregon just don't get that cold.
My US geography is terrible. I saw Milwaukie and thought you were in snow-shoe country!
- Thread starter
- #5
Chuckle! Easy mistake
I use RP 15-40 Duralec in my 1HDT. I add 12oz ZDDP and Lucas stabilizer at 20% to the oil. I go 10k between changes. Usually add 1-2quarts to top off.
Oil sample is on its way to Blackstone right now.
Oil sample is on its way to Blackstone right now.
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- #7
Thanks for the info!
AussieHJCruza
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A
The 1HD-T doesn't really need that much ZDDP, it's not a 2H or 12HT with a flat tappet cam
I believe it just has to be a 40w and has to be CL4 certified for diesel. But that’s it.
w40 is good for most climates worldwide but there are other options. Toyota publish the charts you can see in this thread:
1HDT Oil Options in the US
Hey All, I'm getting ready to start up my 1HDT swap after an engine refresh and am unsure of what oil is the most appropriate in the US. BEBs were replaced etc so I'd like two give them the best chance at a long-isn life. Lol. I've read some pretty old threads (most 10yrs old or more) on...
forum.ih8mud.com
C ratings are one scheme for diesel (API), others like ACEA exist as well. Higher letters/numbers after the C show more modern standards.
Back when the 1HD-T was made CD was probably the current diesel oil standard.
S ratings are for petrol/gasoline spark ignition engines. Many oils have ratings for both engine types.
Oil Categories
The American Petroleum Institute (API) is the only national trade association that represents all aspects of America’s oil and natural gas industry. Our more than 600 corporate members, from the largest major oil company to the smallest of independents, come from all segments of the industry.
www.api.org
- Thread starter
- #11
Nice information; thank you.w40 is good for most climates worldwide but there are other options. Toyota publish the charts you can see in this thread:
1HDT Oil Options in the US
Hey All, I'm getting ready to start up my 1HDT swap after an engine refresh and am unsure of what oil is the most appropriate in the US. BEBs were replaced etc so I'd like two give them the best chance at a long-isn life. Lol. I've read some pretty old threads (most 10yrs old or more) on...
C ratings are one scheme for diesel (API), others like ACEA exist as well. Higher letters/numbers after the C show more modern standards.
Back when the 1HD-T was made CD was probably the current diesel oil standard.
S ratings are for petrol/gasoline spark ignition engines. Many oils have ratings for both engine types.
Oil Categories
The American Petroleum Institute (API) is the only national trade association that represents all aspects of America’s oil and natural gas industry. Our more than 600 corporate members, from the largest major oil company to the smallest of independents, come from all segments of the industry.
Would you look at that, yet another Toyota chat saying 20w50 is good from -12 to over 40 degrees.
if you're in a cold climate you can run -10c and lower
0w40
5w40
10w40
as long as a 40-weight oil you are ok
I run a 15w40 all year round with no issues
0w40
5w40
10w40
as long as a 40-weight oil you are ok
I run a 15w40 all year round with no issues
You can also run W30's. Oils have improved since the 80 series were produced and even thinner oils meet the HTHS (high temperature high stress) requirements that only thicker oils used to.
In my Dmax ute they put 15W40 in it for the first service, I lost ~8% fuel economy. Next service changed back and fuel economy returned.
It wouldn't have been an issue if I was only doing hot running, but starting it from cold twice a day made a big difference.
