5W-10W30/40 or 15W40?

[TresCrows]

</font><font color="blue" class="small">( Sounds like you agree, except for the Tundra part. O.K., I'll bite; did you have problems with a Tundra or other Toyota? I'm completely satisfied with the truck except for heavy towing -- she does get tossed around a bit. I'm considering trading up if I can find a good deal, maybe even a diesel. )</font>

Hmm, you obviously are way new as I am the chief defender of all things Toyota and Kubota /forums/images/graemlins/laugh.gif /forums/images/graemlins/tongue.gif /forums/images/graemlins/grin.gif.

If you can hold off trading up there will be some new 3/4 ton Toyotas in 2006 built in the USA in the spanking new San Antonio plant. I do not know if diesels will be offered. Toyota certainly has the engines but who knows. The only thing I am understanding for sure is that the Gen II Tundra is going to be muscular and big and did I say MUSCULAR /forums/images/graemlins/shocked.gif.

As to Kubota oil--it is fine---the new Mobil 1 Truck and SUV oil in 5W-40 is what I am using now. It is repackaged Delvac 1. J

 

[familyman]

Oh mighty DOATTAK (Defender Of All Things Toyota And Kubota)!

Only kidding, I feel the same way.

Thanks for the feedback, but I have 2 questions:

1) is Delvac 1 synthetic?
2) where can I get more info on the new Toyota?

I don't buy tools based on price. I try to buy the best quality for a given application, if I can possibly afford it. Quality of materials, excellent design and engineering, and durability are trademarks of both Toyota and Kubota.

Thanks again.

Charley

 

[ducati996]

Or how about Honda spec's for 5w-20 just to gain a very minute amount of MPG but at the risk of being too thin in hot weather? I use 5w-30 in them regardless of warranty issues because 20w in my mind is too thin for summer use, and I saw zero MPG improvement when I was using the speced oil.

Just my opinion of course,

Duc

 

[familyman]

Hey, Duc!

Just FYI, the first number, in this case 5, refers to the base weight of the oil. The second number is what the additive package extends the viscosity to. If you want to up your base viscosity, switch to 10w30 or whatever you like. Also, the greater the number spread the more the additive package is making up for viscosity-wise on its own, ie; 10w40 has more viscosity extenders than 10w30, etc. Therefore, oils with a narrower spread (including single weight oils) are better protectors in high performance applications. Pure synthetics are the exception to this rule. If hot weather protection is a concern, go with a higher base number or try a pure synthetic.

Charley

 

[TresCrows]

</font><font color="blue" class="small">( Oh mighty DOATTAK (Defender Of All Things Toyota And Kubota)!

Only kidding, I feel the same way.

Thanks for the feedback, but I have 2 questions:

1) is Delvac 1 synthetic?
2) where can I get more info on the new Toyota?

I don't buy tools based on price. I try to buy the best quality for a given application, if I can possibly afford it. Quality of materials, excellent design and engineering, and durability are trademarks of both Toyota and Kubota.

Thanks again.

Charley
)</font>

Hey, there have been several on line articals and occasional blurbs in the magazines. The "concept" vehicle that was shown recently according to Toyota was inspired by the shape of a clinched fist /forums/images/graemlins/laugh.gif. Does that tell you something? Now, the model that we get I hope is a bit more conventional--concepts are just that--trial balloons for various things. The real thing we get will be more traditional Toyota. There will be a hybrid version as well in a few more years but I kinda expect there may be a diesel--maybe not. I don't expect it will really have the most horsepower or most this or that, I expect it will be a heavy duty Tundra with a bit more trucky styling.

The oil--The Mobil 1 Truck and SUV formula is full synthetic. I have bought some at Wal Mart. I seen it around a few other places as well. It meets or exceeds all diesel and gasoline ratings including Cummings, Ford--all of them /forums/images/graemlins/shocked.gif. and is a 5W-40 range. It has a bright yellow top. There is a blended Mobil product with a yellow top as well so don't confuse them. You can go to Mobil's site for more info. This will be fine for your Kubota but I think your Tundra is just fine with Mobil 1 5W-30.
For years I have tried to use a single oil in everything--I have failed /forums/images/graemlins/frown.gif. But-----I do use the Mobil 1 5W-30 in the Jeep and Tundra, I use Mobil 1 10W-30 (old formula) in the little Toy PU and my air compressor and my lawn equipment and I use the new Mobil 1 SUV/Truck oil in the Kubotas and my Suzuki bike.
J

 

[ducati996]

</font><font color="blue" class="small">( Hey, Duc!

Just FYI, the first number, in this case 5, refers to the base weight of the oil. The second number is what the additive package extends the viscosity to. If you want to up your base viscosity, switch to 10w30 or whatever you like. Also, the greater the number spread the more the additive package is making up for viscosity-wise on its own, ie; 10w40 has more viscosity extenders than 10w30, etc. Therefore, oils with a narrower spread (including single weight oils) are better protectors in high performance applications. Pure synthetics are the exception to this rule. If hot weather protection is a concern, go with a higher base number or try a pure synthetic.

Charley )</font>

Thanks Charley - I forgot to mention that I only use Mobil 1 on all my engines!! 0-30 in winter and either 10w-30 or 5w-30 in the Hondas..

Duc

 

[GerardC]

Thanks for the replies. You always learn something new here on TBN /forums/images/graemlins/smile.gif. G

 

[1075]

Some more good oil info in the following link, although some discussions in the forum section do tend to get a little (OK a LOT) technical. I just bought some Mobil 1 Truck & SUV oil (which has the same specs and according to a tech at Mobil is the same product as Delvac 1) to use in my new JD X595 Yanmar after I break it in.
/forums/images/graemlins/grin.gif
<font color="red"> http://www.bobistheoilguy.com/ </font>

 

[MikePA]

I just did a Search for 'bobistheoilguy' and got a list of 33 messages with a reference to that website. /forums/images/graemlins/grin.gif

 

[RalphVa]

I'd go with what the manual recommends.

I use 15w50 Mobil 1 in all my air cooled engines but switch to 0w40 in the winter on my Gravely. In my diesel car, I use 10w40 year round.

I just switched to 5w30 Mobil 1 in my Toyota Tacoma. Did the economics. If it gives just 3% fuel mileage increase (from 26.3 to 26.8 overall average), and go to 5k mile changes instead of 3k, the Mobil 1 will pay for itself. For this test period, I was careful to get the same vis grade oil as the 5w30 dino oil I'd been using (and recommended in the manual). Doubt it will be economic in my car diesel. Need 6-7% improvement in it, due to the larger crankcase size.

Ralph