P1 oil change. Welcome to the Allard Owners Club. › Forums › Technical Talk › P1 oil change. This topic has 2 replies, 2 voices, and was last updated 10 months ago by Russell McCleave. Viewing 2 reply threads Author Posts November 27, 2022 at 5:53 pm #7472 Russell McCleaveParticipant Thank you Sir. November 26, 2022 at 3:55 pm #7471 Tim WilsonParticipant Hi, Russell: for me, always Halfords or Duckhams 20/50; it’s what l put in all my old cars. As for sump capacity, my engine is a 3.6 Ford Pilot, and l think it’s ca. 4.5ltrs. Hth, Tim. November 26, 2022 at 2:34 pm #7470 Russell McCleaveParticipant Hello. About to do an oil change: 20/40 or 20/50 is the question. And how many litres please ? Thank you. Russell McCleave. Author Posts Viewing 2 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In