What oil should I use for my Hewland Transmission?
Hewland Engineering Ltd is frequently asked to recommend oil type or oil brand for it’s transmissions. It may be that in the future Hewland will have specific product advice, but this is not the case at present. We recommend that only well known brand name gear oils be used. A leading oil company advises us that conventional oils contain ‘too many’ additives for the utmost transmission efficiency, but will almost always lubricate well. Therefore, conventional gearbox oil from one of the leading brand names is almost certain to lubricate very well indeed. It may be at the cost of inefficiencies however. Therefore we do not recommend the use of specific racing oils initially, although a test program may prove these to be advantageous. However, we offer the following advise: Fit a temperature sensor from your data acquisition system into either the gearbox sump area, or into the oil pipeline on a pumped oil system. Monitor the oil temperature and note the pattern of temperature increase a
