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What Motor Oil to Use in Volkswagen TDI Engines?
Ask Your Stickiest Question. . . Or ask us something you’ve always wanted to know about using our products. We’ll sort through all the submissions and present the best questions to our automotive experts. We'll share the questions and their answers here.
What Motor Oil to Use in Volkswagen TDI Engines?
I own an Independent Automotive repair center. I was reading some of your answers on VW oils and was surprised to see you don't recommend Mobil 1 for use in TDI engines. We have used it several times without realizing this. Is it not compatible at all or just that VW doesn't recommend it? Is there something special in their oil? Also, can you tell me if Mobil 1 Synthetic ATF is compatible with 98-01 VW ATF? (They recommend an AE Esso type LT 71141 formula, yellow in color). I'm told that Esso is a European branch of Mobil. Thanks, Tom Janisse, Owner of Durand Mobil Service
-- Tom Janisse, Durand, MI

Mobil 1 Synthetic ATF is probably compatible with Esso Type LT71141 but we do not have any specific data to verify this. Mobil 1 ATF is not approved specifically for VW ATF applications.  Mobil 1 0W-40 is recommended for all engines where oils meeting VW 502.00, 505.00, 503.01 specifications are recommended. Currently we do not market a product in the U.S. that meets VW 505.01 which is required in VW engines in certain VW 1.9 L TDi-PD and 5.0 L TDi-PD engines. Mobil1 0W-40 has not been tested against these requirements.

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