Firstly I'd like to state that I have no affiliation with TSL.

I have conducted a test using 3 different works vans to validate or discredit the use of TSL oil fortifier. I've ran the test over 10 complete tank fills in all three vans without the driver knowing I've added the TSL. The TSL was added shortly after each van had been serviced to ensure consistency.

The average results are as follows:

2010 Volkswagen Caddy DSG - Normal 58L tank returned 540M after TSL 609M = +11%
2007 Mercedes Vito 109 - Normal 70L tank returned 460M after TSL 503M= +9%
2007 Nissan Primastar - Normal 76L tank returned 440M after TSL 484M= +9%

The driver of the Vito van did make a comment that it turned over a lot quicker after the service and seemed to run smoother.

I have nothing to gain from doing this test apart from ensuring I have not wasted £120 on some bogus product.

Combined MPG figures:
40.9 MPG - Volkswagen Caddy
31.7 MPG - Mercedes Vito
33.6 MPG - Nissan Primastar

Extra mileage per tank:
69 Miles - Volkswagen Caddy
43 Miles - Mercedes Vito
44 Miles - Nissan Primastar

Savings per 1 tank of fuel:
£11.12 - Volkswagen Caddy
£8.94 - Mercedes Vito
£8.63 - Nissan Primastar

Diesel price @ £ 1.45 a Litre

This test was conducted over 10 fuel ups which brings the total savings with TSL during this test to:

​£111.20 - Volkswagen Caddy
£89.40 - Mercedes Vito
£86.30 - Nissan Primastar

Total for the 3 vans = £ 286.90

Each van fills up only once per week, so during these 10 weeks a saving was made by the company of £ 286.90 or £ 28.69 per week.

​Per year this would be a saving of £ 1491.88 (52 weeks)

I will be ordering another dose for the vans as the figures above show it pays for itself.

​Kind regards,

​Mr L. Ent