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Oil type for a Mustang GT

slrobertsslroberts Posts: 1
edited March 2014 in Ford
I just purchased a 2000 Mustang GT. In reviewing maintanence requirements, I have discovered that the oil cap on the engine states 5w20 is required; the owners manual references 5w30 in two places. I contacted my dealer, and FORD. One states to follow what the oil cap requires, the other says to follow the owners manual. Anyone know what the real deal is?


  • armtdmarmtdm Posts: 2,057
    Ha, love it when the dealer and manufacturer can't agree. Looks like the 5W20 is the coice but still hard to find outside of a dealership. a 5W30 synthetic may be okay as it flows very easilty which is the main reason for the 5W20 anyway. Whoever says 5W30, ask them to put it in writing.
  • adc100adc100 Posts: 1,521
    5W20 is to raise the fleet gas milage averages. Prove me wrong.
  • hengheng Posts: 411
    I've not seen nor heard of anything that says they are making the engines any different. I've run many an engine past 100,000 miles on 10W30. I would not use 5W20 without engineering technical justification.
  • alcanalcan Posts: 2,550
    Yep, they gotta get those CAFE ratings up and EPA people happy somehow. Could be worse though. Could have Corvette, Trans Am, Camaro type shift linkage which forces a 1-4 upshift on light throttle upshifts. Now THERE'S a plan for fuel economy.
This discussion has been closed.