This new Ten Tenths gear oil additive from Penrite is blended with Molybdenum and PTFE to aid gearshift quality in manual transmissions and to help stop noisy diffs from making a racket.

It also helps with cold-shifting and helps with load protection for extreme situations and can even be mixed with gear oils regardless of whether they are mineral, semi-synthetic and fully synthetic even those with limited-slip additives.

A 125ml tube costs 39.95 and is available now from ENDS.