CNG Car Requires Different Engine Oil?

[Ridethewave]

I was in the workshop recently and they recommended Liqui Moly Top Tec 4100 stating that this is recommended for CNG car. Any reason why?

 

What is the equivalent if I do not want to use Liqui Moly 4100?

 

Can any engine oil gurus advise?

Edited August 25, 2008 by Ridethewave

[Nkps]

which WS recommended you?

[Genie47]

N O.

 

Just use your regular oil. True enough combustion temperatures are higher but ILSAC GF4 rated oil gets that rating for being tortured way beyond CNG use in petrol.

 

Furthermore, you don't get much combustion particulates and fuel washout with CNG to warrant "special" oil.

[Ridethewave]

K***g Auto

Edited August 25, 2008 by Ridethewave

[Ridethewave]

Thanks, genie. Ya they were mentioned abt the high combustion temp that warrant the use of the oil.

 

Separately, my fren had his CNG car done by S*l**t & they were warning his abt the high temp and trying to sell him some oil cooler thingy, some ecu upgrade for better pick up & chg suspension bcos of the constant weight on the car's suspension etc.

 

It's like converting to CNG gave them an opportunity to upsell & cross-sell literally everything they can think of.

 

How much truth does it hold for these "upgrades"?

Edited August 25, 2008 by Ridethewave

[Genie47]

The car does not need anymore special oil and doesn't need that top cylinder lube thingy.

 

Just run on a little petrol which you have been doing every time you start up.

 

Be informed. There is nothing more special for a bifuel car that warrants all these.

[Paddie]

But isn't it true that cars running mostly on CNG will have premature valve seat wear? Will using additives help?

[Genie47]

Ever since we started using unleaded petrol, all valve seats are hardened.

[Modykoh]

CNG contain higher CV (calorific value) then petrol.

In term of combustion, it will set higher temp..

 

However, we got the rediator with thermostate..once the temp reach to the value, the thermostate will activiate and bring down the temp...and the cycle repeat again...

 

i think it only a preference and not a must...