Low oil pressure on a 93' audi s4, 108,000 miles?

2.2 liter inline 5 turbo engine. The pressure is 1.5 bar (21 psi) at idle(6500 rpm) and 4.2 bar (60 psi) on the freeway(3000 rpm). The normal guage parameters are 2-5 bar. I know this is technicaly enough pressure just wondering if I should use 10-40 instead of the 10-30... Read More

  • On high mileage cars worn main and rod bearings as well as a warn crankshaft could be the culprit. You may check the oil filter as well, if it is plugged it could cause low oil pressure as well. Also check to see if your oil sensor is working properly. Or it could be the oil pump. Has it been leaking oil or blowing... Read More
  • oil is too thin you need 5-40 fully synthetic for that car or even better 5-50, also to protect the turbo, cheap 10-30 will not hold its viscosity in the five cylinder engine with that power output

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The 2008 Audi S4 range used to be the only compact luxury vehicle with an optional V-8. Then along came the Cadillac CTS-V, which is absent from the market for the 2008 model year, as it's being redesigned. The Mercedes-Benz C63 arrives this year with scorching V-8 power but no available all-wheel drive; ditto the BMW M3, which comes in convertible and coupe editions as well as four-door form. The Lexus IS-F is a new entrant for the 2008 model year; it has 416 horsepower, an eight-speed automatic transmission, and a 0-60-mph time quicker than all of these vehicles. The Jaguar XF is an interesting alternative, without all-wheel drive but with far sexier looks and an innovative cabin to boot.

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