Today, Isuzu diesel engines operate using ultra-low sulfur diesel (ULSD). For customers that wish to use biodiesel, Isuzu allows use of B5 blended biodiesel as long as the fuel meets ASTM D975 and D6751, however for biodiesel blends greater than B5, additional information and approval is required by Isuzu before these increased blends can be operated in your vehicle. The statements below are directly from the Isuzu Owners Manual. Please review them to further understand our support of these alternative fuels.
Biodiesel (B5)
It is acceptable to use diesel fuel containing up to 5% biodiesel (B5), but the final blended fuel must meet the same specification, ASTM D 975 (Grade Ultra Low Sulfur Diesel), as other fuels used in your vehicle, and the biodiesel used for making this fuel must meet the latest version of ASTM specification D 6751. Biodiesel is produced from vegetable oils or animal fat that have been esterified to reduce the possibility of damage to your fuel system and engine. The use of unesterified bio-oils blended into diesel fuel at any concentration is not approved by Isuzu and could damage your fuel system and engine.
Biodiesel (B6-B20)
Biodiesel blends between B6 and B20 could cause damage to your engine and fuel system if these fuels do not meet strict quality standards. ASTM D7467 has been established to specify the properties of B6 to B20 biodiesel blends. However, field quality surveys have shown that many commercially available B6 to B20 blends do not meet this standard and in fact can be very damaging to your engine. If you plan to use biodiesel grades between B6 and B20, please contact your Isuzu dealer.
Please consult your authorized Isuzu Dealer if you wish to operate biodiesel blends greater than B5. (Applicable on 2011MY and newer N-Series diesel models
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