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    BMW Z3 Oil Selection (M54B25)

    Looks good! I typically use a 5k oil chance interval, I figured that would be good here too. The previous owner had the valve cover gasket, oil filter housing gasket, oil pan gasket and front crank seal replaced over his 20 years of ownership, so the car is dry as a bone. I’m grateful for that...
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    BMW Z3 Oil Selection (M54B25)

    Thanks everyone for the replies! @Pablo the car has 58,000 miles and it’s been serviced annually at a local BMW dealer with OE full synthetic oil. @edyvw I didn’t realize this was an issue. I hoping that since this is a low mileage car that hadn’t been beaten on like the guy in that video...
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    BMW Z3 Oil Selection (M54B25)

    Hello all, I recently picked up a 2001 Z3 2.5i as a weekend roadster. The owners manual states any oil with an API SH or newer is fine, and recommends staying within the 5w30/5w-40 range. It does not mention LL-01 or LL-01FE. Correct me if I’m wrong, but all LL-01 oils carry a higher API...
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    Amsoil 5w-40 for VW 502 Application

    Which 5w-40 are you running? EFM or AFL? Black or red label
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    Amsoil 5w-40 for VW 502 Application

    Comparing Amsoil EFM to AFL: EFM has a kinematic viscosity @ 100°C of 13.6, with a HTHS of 3.7. Preferred pricing at $8.89/qt. AFL has a kinematic viscosity @ 100°C of 14.3, with a HTHS of 3.8. Preferred pricing at $11.89/qt. Is the slightly higher HTHS and viscosity worth the extra 34% in...
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    Amsoil 5w-40 for VW 502 Application

    @Pablo So based on this, the AFL wouldn’t be a good choice for my application despite having a higher kinetic viscosity at 100°C than EFM because it technically isn’t approved? That seems strange. Can you explain how Amsoil handles the “approved” vs “recommended” process?
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    Amsoil 5w-40 for VW 502 Application

    Thank you for your feedback! Motul 8100 X-Cess Gen 2 and Amsoil AFL or EFM have very similar HTHS numbers at 3.8, 3.8, and 3.7 respectively. Is 0.1 enough to make a difference? I’m leaning towards no.
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    Amsoil 5w-40 for VW 502 Application

    I usually stick to a 5000 miles OCI, at most I push to 7500. I feel like EFM would be fine at those intervals. Thoughts?
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    Amsoil 5w-40 for VW 502 Application

    Appreciate the response! Does EFM not hold to a SAE 40?
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    Amsoil 5w-40 for VW 502 Application

    I’m trying to decide which is the best oil for my Audi Q7 requiring VW 502 oil. Based on my interpretation of the Amsoil data sheet attached, the EFM variant is the only one that has the actual VW 502 approval. The AFL version is “recommended for applications requiring VW 502” but doesn’t say it...
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