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What kind of oil do you run in your rig?

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Old 11-27-2017, 03:06 PM   #1
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What kind of oil do you run in your rig?

I have a 3.4 with over 320k miles on it. I live in a cold environment ( northern utah) and have lots of snow. I run a quart of lucas, and 4 1/2 quarts of diesel ( the brand starts with a V) 15w 40. My dad is the original owner so i know the history. I want to hear everyone's opinion on this because everyone has different opinions. Btw this thing has run that kind of oil most its life.

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Old 11-27-2017, 06:22 PM   #2
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Syn 5w-30. STP. I'm going cheap. Used to run Mobil til I stopped believing in brand name. Runs the same...to me.
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Old 11-28-2017, 12:46 AM   #3
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Red face

I use Napa 5/30 5.5 quarts

I change oil around every 3000 miles or so

Toyota filters
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Old 11-28-2017, 02:47 AM   #4
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with 320k original miles, provided the engine hasnt been rebuilt with new bearings, and given the cold environment, a larger viscoaity range multigrade synthetic will give better protection than a thinner oil. something like 5w 30 would be good for a newer engine, but as your clearances might be a little worn, it may be worth going for a 5w 40.
the extra 10 at operating temp will keep pressure up all the way through the crankshaft to the skirt sprayers and also the topend.
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Old 11-28-2017, 02:50 AM   #5
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BTW u disnt actually say anything about what oil u are using. lucas is a brand and quarts are an american measurment, which by the way is incredibly stupid measurment. haha. thi k about it, breaking down gallons into quarters then measuring them into full quartera and half quarters. cmon USA
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Old 11-28-2017, 07:40 AM   #6
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Syn 5w-30. STP. I'm going cheap. Used to run Mobil til I stopped believing in brand name. Runs the same...to me.
Yea im the same way. The only brand name anything i run is the lucas. I goto the truck stop to get the oil norm.
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Old 11-28-2017, 07:42 AM   #7
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BTW u disnt actually say anything about what oil u are using. lucas is a brand and quarts are an american measurment, which by the way is incredibly stupid measurment. haha. thi k about it, breaking down gallons into quarters then measuring them into full quartera and half quarters. cmon USA
I use 15w 40 normaly the brand that has the V on the front
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Old 11-28-2017, 07:44 AM   #8
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with 320k original miles, provided the engine hasnt been rebuilt with new bearings, and given the cold environment, a larger viscoaity range multigrade synthetic will give better protection than a thinner oil. something like 5w 30 would be good for a newer engine, but as your clearances might be a little worn, it may be worth going for a 5w 40.
the extra 10 at operating temp will keep pressure up all the way through the crankshaft to the skirt sprayers and also the topend.
I use seafoam in my rig alot. And never use maverick fuel. I will show you why later. With the thicker oil my truck runs cooler than norm. Runs at 189 norm or lower even
when i dropped the oil pan last summer everything was so clean and looked good. No sludge or grime at all. Was proud of my dad
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Old 11-28-2017, 03:36 PM   #9
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right. as u are in such a cold environment, i would recommend dropping the W number down to about 10 or 5. what exactly is the temperatute there in the morning when its cold?
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Old 11-28-2017, 03:53 PM   #10
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ok so we got a brand, valvoline.
they have many oil product lines, but i cant find a 15w-40 except their gas and diesel range. and some pics on the net of a grey bottle racing 15-40 but thats not on the valvoline.com site.
which oil u using haha.
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Old 11-28-2017, 04:03 PM   #11
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on the valvoline website, i find my recommendation for u is..
valvoline max life (red bottle) synthetic blend high mileage in 10w-40.
purely for its seal rejuvenation properties.
the std durablend has higher zinc levels and a slight better (lower) startup viscosity and alight better (higher) hot viscosity but thats no good if your leaking oil out a seal.
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Old 11-28-2017, 06:24 PM   #12
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right. as u are in such a cold environment, i would recommend dropping the W number down to about 10 or 5. what exactly is the temperatute there in the morning when its cold?
Been running 15w 40 its who life. Higher milage engines need thicker oil.
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Old 11-28-2017, 06:27 PM   #13
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right. as u are in such a cold environment, i would recommend dropping the W number down to about 10 or 5. what exactly is the temperatute there in the morning when its cold?
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Originally Posted by Thommo Thompson View Post
on the valvoline website, i find my recommendation for u is..
valvoline max life (red bottle) synthetic blend high mileage in 10w-40.
purely for its seal rejuvenation properties.
the std durablend has higher zinc levels and a slight better (lower) startup viscosity and alight better (higher) hot viscosity but thats no good if your leaking oil out a seal.
I have no leaks. Have pulled out this engine so many times because of pure desire to learn. Even swapped into my 93 T100 with 4.77 gears. This beast has been running that lucas and 15w 40 almost its entire life. I will upload a pic to show you the oil i use. I use the diesel oil
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Old 11-28-2017, 11:20 PM   #14
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oh. so the point of this thread was actually to tell everyone that what u are using should be the best. .
higher mileage vehicles need thicker oil yes. but not on the w scale the w scale doesnt come in to the equation here. when the vehixle is cold, the oil is incredibly thick and there is no problem with oil pressure even from a 0W oil.
No matter how worn ur engine, if it runs without banging loudly at operating temp, when stone cold, there will be sufficient oil pressure with any oil.
The thickness u need with an older engine is in the hot number, the second number. this is how the oil acts when hot. This is where the worn bearing and clearances start to become affected by the heated thinned out oil. Its this number u want to keep up. 40 is fine.
but i suggest u move ur w number lower, as a 15 weight oil will take longer to push through the pump and filter when cold, than a 5 or 10 w. this is cruicial as there is no oil in the galleries at this initial startup stage and the faster u can prime them, the less initial startup wear u will receive.
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Old 11-29-2017, 12:01 AM   #15
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Well said there.

15w in cold weather...that didnt look right, but to each his own. Leaky engine history perhaps?

STP beats Lucas hands down. Just by feeling the bottle and the way the container looks.
.
kidding

Oil is so debatable like briefs vs boxers
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Old 11-29-2017, 01:45 AM   #16
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no joke, i choose a brand we have in australia called Penrite simply because the bottle is sexy and black. our marketting in our country has really got their finger on the pulse. check out Penrite oil penrite.com.au and look at those beautiful containers haha
and theyve just got soo soo many different oils.
some with zinc, some with moly, some with seal rejuvenators, some with this, some with that. we are blessed with Penrite.

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Old 11-29-2017, 05:16 AM   #17
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5w30 Castrol Synthetic or mobil if on sale in all of my toyota's all year around in Northern Ontario, Canada, using OEM toyota oil filters, I actually use the oil filter from a 4.0L Taco as it is taller, 475,000km on 3.4L, 350,000km on 3.4L, 230,000km on 3.4L, and 150,000km on a 4.0L taco. we see temps as high as 32*C and as low as -32*C, the engine with 475,000km's plows my driveway all winter no block heater, and sits all summer. 5w30 is very fuel efficient as well, thats why they recommend it, only place I ever had oil leaks was the valve covers due to dried out 18 year old gaskets. I change oil every 8-10,000Km.

Last edited by Malcolm99; 11-29-2017 at 10:42 PM.
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Old 11-29-2017, 09:56 AM   #18
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Well the 5vz is older . and i just like to hear how other people take care of their 3 4. The 3.4 is a legend and its always good to hear others experience with them
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Old 11-29-2017, 11:25 AM   #19
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Valvoline High Mileage, a Toyota D3 filter, and a 5k mile interval
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Old 11-29-2017, 05:02 PM   #20
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the idea that oil makes an engine more efficient has truth, but dont use it as a reason to choose thinner over thicker.
the tested maximum increase in efficiency is publicly available from shell and castrol, as about 4%.
this is in a tested envieonment on an engine with the perfect clearances to benefit from it.
our old toyotas certainly dont come close.
for this reason, i would be choosing hot viscosity protection over fuel economy any day, as a bottom end rebuild would be in the thousands, and the 1% fuel savings would be measured in the 100s of dollars over 10 years.
Engines should use oil to protect their insides.
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