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    Oil Consumption, Oil Pressure Warning Light

    Re my V8 5.0 - new 1st March 2020.

    I was loving the car to bits until 2 weeks ago when I dipped the oil and it was BELOW the minimum after 1,215 miles. Having had 8 new/ex demo Vauxhalls in the last 18 years that I put a total of 0.8 litres in one car and once only, I was staggered to find the Mustang needed 1.325 litres to get it back to the maximum - circa 500 miles to the pint. I thought the days of carrying a gallon can of GTX in the boot were long gone ! . .

    The car is in the dealers today, but I guess they will say it is "normal". Has anyone else had the same issues and given it was 450 ml below the minimum, am I likely to have caused any longer term issues ?

    I was comforting myself with the fact that the Oil Pressure warning light had not been on - that used to be a psuedo oil level warning light in my first car - an Austin Maxi - as when you went around corners with low oil, the pick up drew a blank and the warning light would come on.

    So I have been looking for the Oil Pressure warning light and it does not illuminate when the ignition is on. Perhaps the systems have changed but the handbook says it has one. The battery and the engine management light do come on until the engine is started. Has anyone else had this issue. ?

    #2
    Originally posted by JPJH View Post
    Re my V8 5.0 - new 1st March 2020.

    I was loving the car to bits until 2 weeks ago when I dipped the oil and it was BELOW the minimum after 1,215 miles. Having had 8 new/ex demo Vauxhalls in the last 18 years that I put a total of 0.8 litres in one car and once only, I was staggered to find the Mustang needed 1.325 litres to get it back to the maximum - circa 500 miles to the pint. I thought the days of carrying a gallon can of GTX in the boot were long gone ! . .

    The car is in the dealers today, but I guess they will say it is "normal". Has anyone else had the same issues and given it was 450 ml below the minimum, am I likely to have caused any longer term issues ?

    I was comforting myself with the fact that the Oil Pressure warning light had not been on - that used to be a psuedo oil level warning light in my first car - an Austin Maxi - as when you went around corners with low oil, the pick up drew a blank and the warning light would come on.

    So I have been looking for the Oil Pressure warning light and it does not illuminate when the ignition is on. Perhaps the systems have changed but the handbook says it has one. The battery and the engine management light do come on until the engine is started. Has anyone else had this issue. ?
    The S550 engine during the running in period are known to burn a small amount of Oil up until around 10,000 miles mine did use a little although I couldn’t say exactly how much as I checked it at least once a week in the summer and probably once a fortnight during winter ( as it’s not my daily) so depending on use. Once I was advised you reach 10000 miles it shouldn’t burn any and I personally found this to be right as my last service was at 9000 and It’s now on 11000 and hasn’t used a drop. I hope this helps

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      #3
      Thanks - that does help - just wish I had known about it so I could have been checking it after say 500 miles and not 1,200 miles as I did. I am hoping being 450 ml short for maybe 2-300 miles will not be an issue.

      I have the car back from the dealers. they confirm there are no oil leaks and want me to go back after 1,000 miles so they can see how much it has used. If it uses the same amount then it will be below the minimum before I take it back ! The manual does say that normal oil consumption occurs after 3,000 miles.

      Regarding the Oil Pressure warning light - there is not one despite it showing in the manual - on page 72. The technician advised - "Vehicle does not have oil light A fault with oil pressure will display error message "oil pressure low/stop now" .

      Page 83 of the manual does mention this within "information displays"

      Comment


        #4
        Another point - page 238 of the manual states "Do not use more than 1 litre of oil between scheduled service intervals." That would infer that Ford are not expecting the car to use more than 1 litre per 10,000 miles. My car has used 1.325 litres in 1,200 miles ! So - what am I supposed to do - pay 150 for an oil and filter change ? It is all a mystery to me as to why so much oil is being burnt. .

        Comment


          #5
          Had you previously dipped the oil and found it to be full then after 1200 miles dipped it again to find it had used this oil. It could have been that it was not topped up correctly from new, although it should have been. Top it up correctly now and then check again after say 500 miles. If it is burning that much oil I would then take it back to the dealer.
          Allan

          Comment


            #6
            The check at 1,200 miles was the first time I dipped it, so in theory it could have been short at new, but surely not ? I seriously never expected this at.

            Having said that, I used to be in the motor trade over 40 years ago and a guy had his Mini serviced at a Lancaster BL dealer, drove it home 7 miles to Carnforth, dipped the oil and it was empty - they had never re-filled it. He called the dealer to be advised - bring it back sir and we will put the oil in for you ......... How was that for bad customer service !!! Needless to say they got sharp words and had of course to do the right thing and go to the customer to put the oil in.

            Or the Honda that had the gearbox oil drained - but they forgot to refill it and it got 20 miles before the gearbox seized. I won't mention the two times I forgot to tighten the wheel nuts on customer's cars ...... .

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              #7
              Just checked the oil again after doing 105 miles yesterday to the garage and back, and the level is down about 1/8 of an inch on the stick. It must be drinking it. I am just hoping it settles down after a few thousand miles, otherwise I will have to send it back after the 2years PCP deal is up.

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                #8
                Hi, sad to hear your tale! My 17MY GT has done nearly 8,000 miles. 2 annual services completed but I have never needed to add any oil. I think that you may have an issue and would continue to push your dealer for a resolution. I believe that it’s VERY rare for a modern car (with normal use) to drink oil...

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                  #9
                  Think you need to get it back to the dealer and get them to investigate the engine a bit more, obviously its burning it rather than it leaking onto the floor. Only ever had 1 new car and in 20 years its never used any oil, in fact I have never owned any car which uses oil.

                  Comment


                    #10
                    Many thanks for the support.

                    I am convinced there is something seriously wrong with the engine. I simply cannot comprehend that 500 miles to a pint can be normal.

                    However, I can only follow what the dealer suggests - put another 1,000 miles on the clock and let them see first hand how much it has used. I fully appreciate that they are unlikely to be able to put forward a warranty claim to Ford based on what I am saying. There is also the possibility that it was short on oil from new or that the usage does settle down, so best to follow the dealer's guidance for now.

                    I realise that time is the great healer in these instances, but to say I am disappointed is a huge understatement.


                    Comment


                      #11
                      If the engine is running well, with full power and responsive then its unlikely to be something serious with the engine unless someone forgot a oil scraper ring when the engine was built.

                      Its as or even more likely to be crankcase pressure due to the recirculating enviro setup which can raise oil consumption. There could be an exhaust gas valve stuck or sticking. So I wouldn't panic just yet especially as the car is under warranty and you have advised your concern to the dealer. Until you fill and check the decline on the dipstick you cannot be sure there is any oil being lost or burn't. I've had new lawnmowers and gearboxes on plant supplied underfilled or without any oil at all so I wouldn't assume the engine was topped up to the full line at the initial fill. Every half litre of oil saved by the OEM on every engine adds up to a lot of money.

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