What is the recommended octane on an Isuzu Pickup 1990?

The recommended octane rating for a 1990 Isuzu Pickup typically ranges from 87 to 91 octane, depending on the specific engine configuration and model. Generally, regular unleaded fuel with an octane rating of 87 is suitable for most standard models. However, for optimal performance and to prevent knocking, higher octane fuel may be beneficial, especially in vehicles with higher compression engines. Always consult the owner's manual for the specific recommendations for your vehicle.