!! Need 0W-20 oil (Bristol)

[Bonefishblues]

Originally Posted by Zebster

Hypothetically putting aside all the other oil specs, I can't see how the slightly thicker oil would be directly damaging to the engine, but it would put greater load on the oil pump drive and so damage the fuel economy.

Indeed. I used to run Prii, where 0-20 was specced as part of the drive to lower internal friction and improve efficiency.

[AndyV7o]

Originally Posted by Bonefishblues

Yes, I've read a good deal about oil, including that, but it doesn't answer my question as to whether a 0-30 would be deliterious to an engine which specced 0-20. Any thoughts on that?

If you read in that thread noting talk and behaviour of the HTHS values...
The 0w20 volvo/C5 spec is exceedingly light, if you were to use a C2 0w30 youd probably get away with it ok, a B4 spec 0w30 would/could cause excessive oil pressure and reduced flow starving the engine of oil and possibly killing the oil pump. The saps of the spec also need to be considered, too low=engine wear, too high=dpf death (figuratively speaking)
Its not simply about xW xx in this day and age.

[AndyV7o]

Originally Posted by Bonefishblues

Indeed. I used to run Prii, where 0-20 was specced as part of the drive to lower internal friction and improve efficiency.

Its the drag which is reduced, and the base oils used/needed to make these oils by nature tend to have a better film strength if the crank journals etc manage to push through the hydrodynamic 'cushion' of oil. Its not friction which is lowered per-se (though of course drag is largely down to internal friction within the oil itself)



The thing is, engines designed for these light oils have exceptionally tight tolerances in order to use them, which makes them even more intolerant of incorrect viscosity/hths

[AndyV7o]

Originally Posted by Bonefishblues

64000 dollar question - would a 0-30 kill the engine, and if so, how? Am interested to better understand, if possible.

See above (I know, Ive gone backwards!)
It largely depends on the particular engine and the particular oil.
Owt else ask away chap, but, praps move over to the oil thread to stop this one getting cluttered. 👍

[Miyo360]

Ok. So I now have the Gulf stuff. See attached photos.

Am a little concerned that the label says "recommended for high performance petrol engines"!

Still ok to pour it in...?

[Miyo360]

Ok. And lastly. When checking the oil level in my car (see attached), mine looks nothing like the video at the top of this page

https://support.volvocars.com/lb/car...a801e801324f11

[Zebster]

Originally Posted by Miyo360

Ok. So I now have the Gulf stuff. See attached photos.

Am a little concerned that the label says "recommended for high performance petrol engines"!

Still ok to pour it in...?

Unless explicitly spec'd for a DPF diesel then I'd not use that in my 2015 V60 D4 (181) and have already provided a link to the ECP-available 0w-20 oil that my brief research suggested to be acceptable.

However it has been suggested that you may have a different engine, if your vehicle is AWD (in which case you apparently require a 0w-30). But it'd still need to be suitable for a DPF diesel.

[Miyo360]

Originally Posted by Zebster

Unless explicitly spec'd for a DPF diesel then I'd not use that in my 2015 V60 D4 (181) and have already provided a link to the ECP-available 0w-20 oil that my brief research suggested to be acceptable.

However it has been suggested that you may have a different engine, if your vehicle is AWD (in which case you apparently require a 0w-30). But it'd still need to be suitable for a DPF diesel.

I can't believe how difficult this is... Joe Public wouldn't have a chance finding the correct stuff.

I have a FWD engine (engine code D4204T5, apparently). If you have the same engine and put your reg into ECP, does the Gulf oil come up as compatible?

[AndyV7o]

You're only using the gulf as top-up, to the bare minimum until car stops shouting at you, for the journey home. It will be fine. You have to remember theres a good gallon of the correct stuff in there, 500ml wont really make any odds on the whole.

[Zebster]

Originally Posted by Miyo360

I can't believe how difficult this is... Joe Public wouldn't have a chance finding the correct stuff.

I have a FWD engine (engine code D4204T5, apparently). If you have the same engine and put your reg into ECP, does the Gulf oil come up as compatible?

Probably a bit late now, but NO... only the Shell stuff that I previously mentioned comes up on ECP (which the Shell website confirms!):- https://www.eurocarparts.com/ecp/c/V...95e2dbd&000398

And yes, mine is a D4204T5.