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I asked penrite in their live chat what their HTHS ratings were for each of those oils and thats what they told me

What I found interesting; Penrite Enviro+ 5W-30 C3 - HTHS is 2.9 Penrite Enviro+ 5W-40 - HTHS is >3.5

So the MB229.51/52 spec seems to be having a low sulphated ash content and high level of HTHS? Guessing some oils might meet these requirement's but might not have paid the spec? Example - Gulf Western Premium Energy SP Engine Oil - 10W-30...

Assuming you mean higher fuel consumption?

Assuming the higher the number, the better - will give it better resistance to sheering at high tempretures.

Wow - did not know that, so the dpf regen process's doesn't remove this particulate? Some of the oils mentioned in this thread are not readily available in aus, or are very expensive. Common brands here are Penrite, Nulon, Gulf Western, Valvoline

This was my thought process re the DPF - the ash content will make it clean itself more or possibly block it, the musso does automatic burn offs in the background, so far so good. - I didn't know about the HTHS though, that makes me feel a bit better.

Does the Sulphated Ash matter for DPF's? Assuming you mean High Temperature/High Shear (HT/HS)

All the 5w-30 MB spec oils are averaging around $10 per L when on sale down here in aus. Hoping to find a cheaper suitable alternative

I hvae a 2019 Ssangyong Musso D22DTR Diesel 2.2L with a DPF, that is calling for a 5w-30 in the MB 229.51 or MB 229.52 spec. A 5w-30 in aus seems a bit low, i have always run my cars with a 5w-40/10w-40. would it be ok to use a 40 oil ? or even a 15w-40? Not sure if running an oil not that...

Yes they are two seperate readings but if your boiling coolant I can only imagine how hot the oil must be getting. While different temps, they are related.

Interesting - I didn't know the history of this. Do you have anything you can share so I could read up about it ?

This is what I found most interesting. Yamaha specs weights based on Ambient temperature. Yet KTM/Husqvarna do not and just say a 10w-50. This is why I was considering deviating from the book because other manufacturered 250 4 strokes will allow these viscosities. Couldn't imagine the...

Coldest winter temps I would ride in would be 5c-8c then it would probably get to about 13c. Average temp anywhere from 15c-25c. Hottest temps when I would ride probably hit 30c that would be the max I would want to ride this bike in.

What about the 40 vs 50 part ?

Have a Husqvarna FE250, 2022. - 250cc 4 stroke, single cylinder, wet clutch. Owners manual calls for a 10w-50 with the JASO spec MA2. Have been using 10w-40 in so many bikes before this, street triples, DRZ400, DR650, WR250F, 2 stroke gearbox oils. Would there be any issues in using a 10w-40...

Sorry I should have been more specific, all the motorcycles in question are water cooled. Specifically a WR250F and Street Triple R. I do agree a air cooled bike may be more demanding due to also cooling the engine, but generally they have larger sumps to accommodate this don't they?

Hey all, I have been thinking lately about all the specifications of oils for motorcycles vs cars. Now there are a few oils out there, least in aus that are full synthetic, go on sale often enough and are a good quality full synthetic oil and say they are suitable for motorcycles, but carry no...

I would like to fight against the shearing, especially in the WR, being carby'd, small sump and lots of fuel dilution along with shared gearbox duties. Looks like I will be sticking with a 10w-40. Only reason is there is a great deal going on a full synth 5w-40 (Valvoline Synpower, ends up...

Hey all, I have a 2013 WR250F and a 2006 SV650N, both bikes call for a 10w-40 oil, but thinking that a lower Winter rating would be better for my engines. From what I know about oil, all that will be different will be the "cold" start rating. Once warm they should be the same viscosity as...