My local VW/Skoda dealer says thet they put 5w50 oil on the engines, but looking on castrol website I can see ONLY that the one for the VW sercice is the 5w40, is any problem at future with using wath dealer says? saddly i need to follow they sugestion fot my warranty service.

FROM WEBSITE:

"SAE 5W-50:

Provides the widest range of protection available. SAE 5W-50 delivers exceptional cold temperature pumpability for rapid oil circulation at start-up and provides a thick oil film for ultimate wear protection. Exceeds all car and light truck manufacturer's warranty requirements for the protection of gasoline, diesel and turbocharged engines where API SM, SL, SJ, SH, CF or CD is recommended. Exceeds European ACEA: A3, B3, B4; Ford WSS-M2C931-A and the engine protection requirements of GM 4718M, ILSAC GF-4 for API Certified Gasoline Engine Oils.

SAE 5W-40:

Engineered specifically to meet the Volkswagen engine warranty requirements, exceeding VW 502 00 and 505 00. Exceeds all car and light truck manufacturer's warranty requirements for the protection of gasoline, diesel and turbocharged engines where API SL, SJ, SH, CF or CD is recommended. Porsche approved and also exceeds European ACEA: A3, B3, B4, MB 229.3, MB 229.1, BMW LL-98. Meets the engine protection requirements of Volvo, BMW, Mercedes Benz and ILSAC GF-3 for API Certified Gasoline Engine Oils." Thanks

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SV

I was hoping for someone who knows more about the oils to answer this, but IMO you should NEVER use a thicker oil than the OEM recommends in a hydraulic tappet engine, because it adversely affects valve operation.

You might never have experienced this, but my car sounds "quietly tappety" when started from cold at sub-zero temperatures, because the thick cold oil stops the tappets reaching their correct lengths.

OK, consider KenONeill that I'm in Venezuela, plus 35 Celcius temp all year long, tomorrow or saturday gonna take a look at the mech.'s dealer

Thanks

SV

I think you should go with what your dealer says since that takes local conditions into account.