Mix mineral and synthetic oil

[Contax]

Can I mix the mineral oil and synthetic oil together as there is some left over from previous servicing?

What is MB229.1 /MB229.3 huh?

Thanks

[Furrynadz]

MB sheet 229.3 approved oils

for passenger cars with gas and diesel engines with extended drain interval indicator FSS up to 20,000 km, or 40,000 km - 25,000 mi, min. 1.0% fuel saving compared to 229.1, based on ACEA A3 B3. For gas engine of the M100 series, gas engines of the M200 series and diesel engines of the OM600 series (not models with Euro 4 diesel particle filters).

 

================================================

 

 

MB sheet 229.31 approved oils; LA "low ash" Oils

This is a new spec pioneered by Mercedes for passenger cars with diesel engines with EURO 4 soot particle filters, e.g. W211 E200 CDI, E220 CDI. The spec was introduced 7/2003. They are called LA "low ash" oils, low on sulfated ash, phosphorus and sulphur to limit particle filter pollution. Oils high in e.g. ZDDP additive can not qualify. In 2005 the ACEA C3 spec was introduced.

 

================================================

 

MB sheet 229.5 approved oils; "MB Longlife Service Oils"

for passenger cars with gas and diesel engines with extended drain intervals beyond 229.3 oils, to 30,000 km, min 1.8% fuel saving, first oils introduced summer 2002. For gas engines of the M100 series, gas engines of the M200 series and diesel engines of the OM600 series (not models with Euro 4 diesel particle filters).

229.5 engine oils must be used with fleece oil filter designed for use with 229.5 engine oils.

[Furrynadz]

MB229.1 is intended to cover minimum specifications for passenger cars with petrol or diesel engines prior to the introduction of 2002 model year vehicles from Mercedes.

 

Although it calls for high detergency, MB229.1 is not a particularly onerous specification for modern lubricants and can in fact be achieved even with a plain mineral oil of say, 15W40 viscosity grade if the right additive pack is selected. It equates to ACEA grades A2/B2 and to some of the requirements of ACEA grades A3/B3 but despite its A3/B3 rating it is NOT intended for use over extended drain intervals. This means the oil must be changed every 6,000 miles if it only complies with MB229.1.

 

The latest generation of engines from Mercedes are higher performance BUT need to give improved economy and longer drain intervals dictated by the need to reduce service time and cost.

 

Hence MB229.3 was introduced to ensure that the engine lubricants can cope with these new demands.

 

The need for drain intervals of 12,000 miles or more in higher performance engines can give rise to problems with plain mineral oils since the lighter base stocks can evaporate off over this time, thickening the oil, concentrating contaminants and increasing oil consumption (topping up is required to replace the evaporated stocks). Additionally, the demand for better economy means that the oils viscosity MUST be relatively low and plain mineral oils are not very good at preventing wear when they are low in viscosity.

 

This incompatibility with plain mineral oils and MB229.3 means that MB229.3 oils are generally Fully Synthetic. Equally they will have low viscosities (typically 5W40 or 0W40 but they can be as low as 0W30!) and must meet the full requirements of ACEA grade A3/B3 "

[Genie47]

Are your service intervals at 10k km? Well screw it and mix them and use them.

[Contax]

Very comprehensive!

So can I assume that MB229.1 are meant mainly for mineral oil only and MB229.3 and above are mainly synthetic?

Thanks again.

[Contax]

Err actually no.My mileage oladi 155k.

Will mixing the mineral and synthetic oil together cancel out the addictive in there?

Probably i will have to flush out the oil after 5k , I assume?

[Genie47]

No what I mean is the oil change interval not your car's total mileage. If you have 10k km oil change intervals, it doesn't matter. Just mix and use.

[Contax]

oic.can liddat one.Will it affect the engine in the long run?

[Genie47]

Nothing happens. No effect. The only thing your engine cares about is having the correct level of lube in it.

[Contax]

Thank you.