Sticking Turbo Vanes and 2 Stroke Oil

**PerthDisco** · 11th March 2024, 06:04 PM

Originally Posted by DiscoDB

Just adding to my post above. Did some digging into SDS’s to see what the primary components are in various two stroke oils, fuel additives, and even for interest some engine oil flush products.

Most two stroke oils are a base oil blend with kerosene. The same kerosenes used as the primary component of most diesel injector cleaners.

Some oils use a more aggressive naphtha solvent which is also used in diesel injector cleaners, as well as carbon removal and engine flush products.

If you were to alternate between Penrite’s fully synthetic MC-2 (or even Castrol Activ 2T) and then the part synthetic MC-2 two stroke oils, you are effectively giving the system a dose of Penrite Diesel Injector Cleaner. The only missing additive is a small dose of a metal deactivator which claims to reduce gummy residues from forming.

Castrol Act>evo 2T is the oil which is often recommended on the Disco3.co.uk forum, but is not available in Australia. The closest would be Activ 2T but this potentially has a lower kerosene content. Which could be a good thing as Kerosene reduces lubricity.

If using plain “garden” variety two stroke oils these tend to just be mineral base oil with minimal other additives (<10% kerosene). I have not added as these are generally not a low ash oil, and may not burn as cleanly.

Many thanks DB. Will definitely give this a go next long trip

**DiscoDB** · 11th March 2024, 06:12 PM

Originally Posted by PerthDisco

Many thanks DB. Will definitely give this a go next long trip

Will be interested in your experience.

I am not endorsing these products, but I can see why people report observing benefits.

And it can become an expensive habit if the engine gets an addiction to two stroke oil.

**PerthDisco** · 11th March 2024, 06:13 PM

Originally Posted by DiscoDB

Will be interested in your experience.

I am not endorsing these products, but I can see why people report observing benefits.

And it can become an expensive habit if the engine gets an addiction to two stroke oil.

I miss my CR250 Honda so much I hope there’s a whiff of nostalgia out the exhaust

**discorevy** · 11th March 2024, 08:15 PM

Originally Posted by shack

Yeah the vanes are on the exhaust side, I've got one I'm meant to pull down, I'll post some pics when I get time (that's a joke, I'll never get time to do it).

VVT Turbine.jpg

Here's one I prepared earlier James, I know you have plenty other stuff to do

The carbon builds up on the vanes and housing (although this one had a different problem causing the sticking and I had already cleaned the vane ring) so you can see why even a slightly wetter exhaust gas might free them up

**DiscoJeffster** · 11th March 2024, 08:21 PM

Need to flip the vane assembly for viewing

**discorevy** · 11th March 2024, 09:00 PM

Originally Posted by DiscoJeffster

Need to flip the vane assembly for viewing

You'll have to use your imagination.... or the vane pattern in the housing

**shack** · 11th March 2024, 10:38 PM

Originally Posted by discorevy

VVT Turbine.jpg

Here's one I prepared earlier James, I know you have plenty other stuff to do

The carbon builds up on the vanes and housing (although this one had a different problem causing the sticking and I had already cleaned the vane ring) so you can see why even a slightly wetter exhaust gas might free them up

Well done! Good pic..

**Tins** · 12th March 2024, 09:30 AM

Nothing wrong with a little added upper cylinder lubricant....... On my Ford I let the valve guide seals take care of that.

Jokes aside, what's the opinion on something like Stihl full synth? Just curious, VVTs are a little out of my league.

**DiscoDB** · 12th March 2024, 09:42 AM

Originally Posted by Tins

what's the opinion on something like Stihl full synth?

Looking at the specs, it is a very expensive “garden” variety two stroke oil.

Doesn’t have any kerosene or naphtha solvents, so minimal cleaning benefits, but you would get a dose of oil which is probably a good quality base product. It does have a few other additives which probably help it burn clean.

**Tins** · 12th March 2024, 09:48 AM

Originally Posted by DiscoDB

Looking at the specs, it is a very expensive “garden” variety two stroke oil.

Doesn’t have any kerosene or naphtha solvents, so minimal cleaning benefits, but you would get a dose of oil which is probably a good quality base product.

It's expensive all right. Came with a saw, allegedly with an extended warranty dependent on it's use. Seen that trick before.

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