Inside Line: Comma

A few notes about the Peugeot 807/Citroen C8/Fiat Ulysee (second generation)

Engine Oil

For this particularly series of cars, each manufacturer lists differing specifications for engine oil which should be covered by a number of Comma products. Do not assume that the cars will all use the same engine oil.

With varying service intervals of up to 12,500 miles, oil top up between services can be critical. Supplying the customer with a top up pack and reminding them that they should be checking the engine oil regularly (see handbook for guidance) might also be prudent here particularly if you have noticed that the oil needed topping up when it was brought in. A quick check before you change might be a good way of reinforcing the importance of top up to the customer. Combined with longer service intervals, the increased use of turbochargers makes checking your oil more critical than ever before.

Brake Fluid

Fiat/Citroen/Peugeot use one or two specifications for brake fluid for this series of cars.

Most people don’t think of brake fluid as a service item however, as with many manufacturers, Fiat/Citroen/Peugeot specify a change interval of 24months for this trio. Brake fluid degrades over time by absorbing water from the atmosphere which lowers its boiling point. Boiling point is a critical factor in brake fluid performance because of the amount of heat generated during braking. If the boiling point of the fluid is too low then continuous or hard braking may cause the brake fluid to vapourise which in turn can result in a loss of hydraulic pressure within the system. The message here is that brake fluid is a safety critical item so check and change when specified – don’t assume that it will just be OK.

Power Steering Fluid

Fiat/Citroen/Peugeot use one or two specifications for power steering fluid for these vehicles and it is important to identify which product is suitable for the vehicle you are servicing.


Xstream G30 is the recommended product for most of this triumvirate however there may be exceptions.


For this particular series of cars, the OEMs use a range of transmissions that includes manual, conventional automatic and semi-automatic with various specifications. As well as the different fluid requirements, change intervals and capacities will vary depending on the type of transmission so we would advise you to consult the handbook to ensure that you get the right product for the vehicle you are servicing.

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- who has written 1210 posts on CAT Magazine.

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