Diesel ad­di­tive

Car Mechanics (UK) - - Help! -

The 3.0 diesel en­gine in the X5 is a pretty ro­bust unit and the 2005 ver­sion does not have a diesel par­tic­u­late fil­ter, so you don’t have to worry about this clog­ging up.

Some ad­di­tives are ben­e­fi­cial when used in cer­tain con­di­tions, al­though it is of­ten dif­fi­cult to sep­a­rate the placebo ef­fect from any fac­tual ev­i­dence. Given that you use Shell V-power, which has ad­di­tives in the mix, I would not put any fur­ther ad­di­tives in at this stage. As you say, the oil is changed reg­u­larly and the ve­hi­cle is run­ning well.

Al­though you only cover 5000 miles a year, you do no men­tion the length of each jour­ney. If you take a lot of short jour­neys, as op­posed to a few long jour­neys, I would pos­si­bly con­sider tak­ing the ve­hi­cle for a longer run pe­ri­od­i­cally to help keep any build-up of soot at bay. I have a 2005 BMW E53 X5 Sport 3.0 diesel auto. I bought the car from a BMW dealer with a full BMW ser­vice his­tory and 29,875 miles in May 2015. I drive around 5000 miles a year and al­ways use Shell diesel and some­times Shell V-power diesel.

Some friends have com­mented that there might be a build-up of soot due to my low mileage. I know that BMW do not usu­ally rec­om­mend ad­di­tives, but have found out that they now of­fer diesel ad­di­tives. Do you think that putting a bot­tle of this in my X5 would be ben­e­fi­cial? At the mo­ment, the car is run­ning per­fectly and the oil is changed once a year in between ser­vices. Paul Fin­negan

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