User manual AUDI 100 QUATTRO

[. . . ] 1990 Audi 100 Audi 100 quattro Owner's Manual Your new Audi represents a consummate blend of sophisticated automotive technology and old world German craftmanship. It has been manufactured at the finest production facilities in the world, where the past and the future have come together. Where generations of dedicated Audi craftsmen exercise a lineage of Audi thought, technique and pride. As a descendant of the finest motorcars in Germany, Audi began as an image in the minds of these craftsmen and was the nurtured in their hands. [. . . ] Unleaded fuels may not be available outside the continental USA and Canada. Therefore, we recommend you do not take your vehicle to areas or countries where unleaded fuel may not be available. important to prevent engine "knock", which reduces performance and may cause engine damage. The 91 RON octane rating which you will find on the inside of the fuel tank flap is based on the research method. The AKI octane rating usually displayed on U. S. gasoline pumps is calculated as follows: Research octane number plus motor octane number, divided by 2. Regular fuels have an octane rating ranging from 91 to 95 RON (Research Octane Number) or 87 to 91 AKI. Do not use any fuel with octane ratings lower than 91 RON or 87 AKI. Seasonally adjusted gasoline Many gasolines are blended to perform especially well for winter or summer driving. During seasonal change-over, we suggest that you fill up at busy gas stations where the seasonal adjustment is more likely to be made in time. Gasoline Additives A major concern among many auto manufacturers is carbon deposit build-up caused by the type of gasoline you use. Although gasolines differ from one manufacturer to another, they do have one thing in common. All gasolines contain properties that can cause deposits to collect on fuel injectors and intake valves. Although most gasoline brands include additives to keep engine and fuel systems clean, they are not equally effective. After an extended period of using inadequate fuels, built-up carbon deposits can rob your engine of peak performance. And carbon deposits like those in the illustration can lead to other engine performance problems such as: Gasolines containing alcohol Gasoline containing alcohol is available at gas stations in some areas. The gas pump may not be labeled to identify that alcohol is present in the gasoline. If it is labeled, it may not identify what amount and type(s) of alcohol are used. We recommend you use quality gasoline that is NOT blended with alcohol. The use of fuel containing alcohol can cause loss of fuel economy and driveability and performance problems. If these problems are experienced, we recommend you switch to another brand of gasoline. Octane rating Octane rating indicates a gasoline's ability to resist detonation. Therefore, buying the correct octane gas is 91 VEHICLE CARE § § § § § § unstable idling surging misfiring power loss engine run-on engine pinging or knocking If these problems continue over a long period of time, engine damage can be a result. Damage or malfunction due to poor fuel quality is not covered by the Audi New Vehicle Limited W arranty. Recent fuel developments Over the past few years, more manufacturers advertise detergent additives in their gasoline. These additives are primarily intended to keep fuel injectors clean. However, they are not all equally effective in reducing carbon deposit build-up on intake valves. [. . . ] 98, 154 Unleaded fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Vanity mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 V-belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115, 163 Vehicle care. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90-129 Vehicle identification number/label . . 166 Vehicle operation. . . . . . . . . . . . . . . . . . . . . . . . . . . 81-89 Ventilation/heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]