Knocking / Pinging? Buy engine additives to treat engine knocking problems direct from Skinny Tree Limited. Engine additive treatments can reduce knocking or pinging sounds caused by deposits in the combustion chamber. Wynn's Substi-Plomb lead substitute with fuel stabiliser 250ml £9.99 Buy Wynn's Formula Gold High Performance Engine Treatment 500ml £13.99 Buy Questions? sales@skinnytree.co.uk 5* Reviews Check out feedback Multi-buy 10% Off, 3 of the same Secure Checkout View basket 0
