Dear sir,
I have an Audi A3 1.8T AUM.car. Please inform me about the most suitable engine oil like CASTROL FORMULA RS POWER AND PROTECTION 0W-40 · SAE 0W-40 · übertrifft API SL/CF · ACEA A3/B3/B4 · VW-Normen 502 00 / 505 00 · BMW LongLife-98 · MB 229.1 · Porsche-Freigabe or Castrol FORMULA SLX SAE 0W-30 - Die intelligente Eco-Vollsynthese
Leistungsklassen: Übertrifft API SL/CF - ACEA A3/B3/B4 - Freigegeben nach VW 503 01 (9/99), 502 00 und 505 00 (1/97) - MB 229.3 -BMW (Longlife-01). Plesa advise wheter the above oil are the best for my car or you would suggest other olis?

Thank you for your attention ASAP.

Best Regards<ul><li><a href="http://www.castrol.de/produkte/a_auto/a_motorenoele/a_synthese.html,">http://www.castrol.de/produkte/a_auto/a_motorenoele/a_synthese.html,</a</li></ul>