Just spoken to halfords for an oil change they said they only use castrol edge 5w - 40w is this a suitable equivilent to the recommended Mobil 1 as per the handbook Engine has done 74000 miles.

 

I'd imagine halfords charge a ridiculous amount for an oil change mate, can't you locate the mobil 1 yourself & get a local independent garage to Carry out the change/service?

 

according to castrol website edge 5w-40 meets MB approval specs 229.31 / 229.51 so i would say yes its ok to use
5W-30
Turbo Diesel 5W-40
10W-60
0W-30
0W-30 A5/B5
0W-40 A3/B4
5W-40
Castrol EDGE 5W-40 gives you the confidence to demand maximum engine performance from today’s higher revving, higher output engines that operate under increased pressures requiring lower viscosity oils with higher level of protection.
Available in 4 litre and 1 litre packs
Trusted to Perform

• VW
• BMW
• Audi
• MINI
• Smart
• SEAT
• FIAT
• Renault
• Škoda
• Porsche
• GM / Opel / Vauxhall
• Mercedes-Benz

When choosing oil, please refer to your owner's handbook and the product specifications shown above. May also be suitable for other vehicles.
Meets or exceeds industry specifications

• SAE 5W-40,
• ACEA A3/B3,
• A3/B4, C3,
• API SN/CF,
• VW 502 00/ 505 00,
• BMW Longlife-04,
• MB-Approval 229.31/ 229.51,
• Porsche A40,
• Renault RN0700/ RN0710,
• Meets Fiat 9.55535-S2,
• Dexos2*

 

Thanks for the replys they quoted me over the phone £65.00 , they also do a Castrol Edge 0w - 40w , would the 5w - 40w be a better choice as the engine has done 74,000 miles

 

i would think either would be ok to be honest...£65 seems very cheap our cars take 8.5 quarts which = 9.6 litres, halfords have on their website 4 litres of castrol edge @ £32.79 so two of these + another 1.5 litres + filter = more than £65....interesting to see if they honour that price when you turn up...(if my calculations are correct).....

 

Just been to halfords there oil guide says 5.5 litres and 5w - 40w Castrol as well as Mobil 0w - 40w

 

isn't 8.5 US Quarts about 8litres? Last time I got some Mobil one for mine I got it in Asda as it was on offer (last year) for about 34 quid I think, can't see the point using something other than recommended

 

as long as it conforms to MB specs 229.3 or 229.5 what does it matter what make it is..all information gained from the search section of the forum...

MB 229.5 - Multigrade engine oils (Specification 229.5) - Mercedes-Benz Specifications for Operating Fluids

yes muskrat your right 8.5 us quarts is about 8 litres still a cheap oilchange at £65..although why they would use american fluid measurements in a european built engine that is also used in the slk320 that was around long before the crossfire seems strange...