[ziemann]

Vol940,

Is yours NA, LPT or Turbo? Can LPT/Turbo engines use mineral oil? Is
Magnatec semi-syn? Mine is due for an oil change. Any advice?

As for the petrol, I think it the we to discuss which is the best for 940.
As for me, I don't have any particular brand - mixing Shell, BP and
Caltex - just because of convinience. Anything to share about the petrol?

Regards..

[VOL9833]

Ziemann,
piece of advise from my mech..do not mix the petrol brand. It may cause
your lamda sensor to lite up...is this true? So far i stick to one brand
only...so never experience this..

[vol940]

Ziemann,

Mine is LPT. LPT/Turbo can use mineral oil, but most suggest to use
synthetic oil, since synthetic oil can withstand to high temperature
especially on turbo.

I prefer to use semi-syn with 4000 km to 5000 km change interval, rather
than syn oil for 10000 km. The more frequent change the engine oil the
more engine and turbo healthy and extend the life.

As for petrol, I have done the comparison between Caltex, shell (not V-
power) and Primax, the longer mileage falls to primax. Different result
may occur for other engines.

[vol940]

ziemann,

My advice, when you change your engine oil, please try to change by
yourself by draining completely the engine oil. Drain the oil at night
and refill in the morning. The best condition to change the engine oil
when the engine is COLD.

[vol940]

VOL9833,

In term of petrol, we can mix without problem. But the problem is the
stock additive (like detergent and varnish) for each brand is different.
So if we mix the brand of petrol in the tank, we do not know the
compatibility of each additive ... like our blood ... Blood A is not
compatible with Blood B (coagulation may occur).

This mixed stock additive when we mix severel brand of petrol will harm
the oxygen sensor, especially for zirconium type oxygen sensor.

When you plan to add the external petrol additive (petrol treatment or
injector cleaner), make sure that this additive safe for oxygen sensor.
Most of the volvo oxygen sensor is Zirconium type.

[hohgch]

Wah lau. Very good FC. I normally fill up my tank but not all the way (70
lt mark), but almost for about RM75. Use it for around 460km and it nears
the 10 lt mark and I fill it up for the same. About 0.16/km. How? Average?
I use ESSO. Does it make a significant difference with other petrol brands?

[zhafri]

ermm... my dad (who ia an licensed aircraft engineer) always say this "even
aircraft mix up petrols, why car cannot mix them up"... a good statement
for me...eheheheh....

[ziemann]

Vol940 & Vol9833,

Thanks for sharing. When I travelled from Alor Star to KL recently, I got
slightly more than 28mpg and used Shell. Haven't calculate the mileage for
other brand yet. Even though I mix petrol, I didn't feel the diff. in the
performance of each brand. But I do feel some 'uumph' when using Caltex in
my mousedeer.

Hohgch,

You are getting nearly 25mpg. It is a very good fc if it is mix driving
and certainly excellent fc if in the city - just like our friend Anandkl-
maybe he got some assisted power from the storm!!

[vol940]

hohgch,

You have also very good FC, close to 8.7 km/l.

Each engine requires a certain octane number to prevent knocking — for
example, your car may need premium unleaded rather than regular unleaded
petrol. This requirement is measured under worst-case conditions, and
takes into account a slight increase over time — for example, due to the
build-up of deposits (old engines). In less severe conditions, the engine
can do with petrol of a lower octane number.

Apart from being less likely to develop knocking, an engine won’t benefit
from using a petrol with a higher octane number (for example, it won’t
provide more power). So, it does not make significant difference with
other petrol brands having higher octan.

In my opinion, you may increase your FC by using a new fresh Oxygen
Sensor...

[vol940]

ziemann,

As far as I know, Caltex, doesn’t offer a high-octane fuel, but a 95 RON
(85 MON) premium unleaded product with a detergent package called Vortex.
So may be because of that you feel 'uumph' ... he ..he..