Audi R8, 42 (USA)
Differential fluid capacity & service interval
Audi R8, 42 (USA) differential fluid capacity ranges from 1,3 to 1,4 liters. Service intervals include checks at 15000 miles or 12 months, 15000 miles or 24 months, 20000 miles or 12 months, and 20000 miles or 24 months. The data covers 16 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
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Additional Notes
- The front differential initial fill capacity across all Audi R8 42 configurations listed is 1.4 liters, while the refill capacity is 1.3 liters. The 0.1-liter difference between initial fill and refill reflects the small volume of fluid that remains in the differential housing and passages after a drain, meaning a full dry-build assembly requires slightly more fluid than a routine service top-up or fluid exchange.
- The 1.3-liter refill figure applies uniformly across the 4.2 FSI quattro variants (309 kW and 316 kW) and all 5.2 FSI quattro variants (386 kW, 404 kW, and 412 kW), indicating that the front differential unit shared across the R8 42 platform has a consistent internal volume regardless of engine output.
- For the R8 4.2 FSI quattro at 309 kW (2007-2010) and the R8 5.2 FSI quattro at 386 kW (2008-2010), the normal-use front differential check interval is set at 20,000 miles or 12 months, whichever comes first. The 12-month time limit is notably shorter than the 24-month time limit applied to later configurations, meaning calendar time was a more constraining factor for those earlier model years.
- Starting with the R8 4.2 FSI quattro at 316 kW (2010-2013) and continuing through all subsequent configurations in the specifications, the normal-use check interval extends to 20,000 miles or 24 months. The doubling of the time-based interval from 12 to 24 months represents a meaningful shift in how frequently a calendar-triggered service would be required under normal operating conditions.
- A "first check only" interval of 15,000 miles or 12 months applies to the 309 kW 4.2 FSI quattro (2007-2010) and the 386 kW 5.2 FSI quattro (2008-2010). This earlier first check, compared to the 20,000-mile normal interval, is standard practice for break-in service on differential units, allowing inspection of fluid condition after initial component wear-in has occurred.
- For configurations from 2010 onward, the first-check-only interval is 15,000 miles or 24 months. The mileage trigger of 15,000 miles remains consistent with the earlier first-check intervals, but the time component extends to 24 months, aligning with the broader shift to longer calendar-based intervals seen across those later configurations.
- The R8 5.2 FSI quattro at 386 kW spans three separate year-range entries: 2008-2010, 2010-2012, and 2013-2015. The 2008-2010 range carries the 12-month time-based interval, while the 2010-2012 and 2013-2015 ranges both use the 24-month interval, showing that the interval revision for the 386 kW variant occurred at the 2010 model year boundary.
- The R8 5.2 FSI plus quattro at 404 kW (2013-2015) shares identical front differential capacity and check interval specifications with the standard 386 kW 5.2 FSI quattro for the same 2013-2015 period, despite the power difference of 18 kW between the two variants.