Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP2014GRAND CHEROKEE LAREDO, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCEFUEL DELIVERYFUEL SYSTEMFUEL DELIVERY, DIESELSTANDARD PROCEDUREDIESEL FUEL SYSTEM CONTAMINATIONBIODIESEL-FUEL-REQUIREMENTS
2014 Jeep Grand Cherokee Laredo, AWD
Diesel Fuel System Contamination: Biodiesel-Fuel-Requirements
2014 Jeep Grand Cherokee Laredo, AWDSECTION Biodiesel-Fuel-Requirements
- A maximum blend of 5% biodiesel meeting ASTM specification D975 is recommended for use with your diesel engine. If frequent operation with Biodiesel blends are greater than 5% but not greater than 20% (B6-B20) is desired, the maintenance schedule is subject to shorter intervals. The oil and filter change along with fuel filter replacement is subject to shorter intervals when operating your engine on biodiesel greater than 5%. Do not use biodiesel greater than 20%. For regular use of biodiesel blends greater than 5% but not greater than 20% (B6-B20) it is important that you understand and comply with these requirements. Refer to the "Maintenance Chart" in MAINTENANCE SCHEDULES for further direction. Failure to comply with Oil Change requirements for vehicles operating on biodiesel blends greater than 5% but not greater than 20% (B6-B20) will result in premature engine wear. Such wear is not covered by the New Vehicle Limited Warranty. Biodiesel is a fuel produced from renewable resources typically derived from animal fat, rapeseed oil (Rapeseed Methyl Ester (RME) base), or soybean oil (Soy Methyl Ester (SME or SOME) base). Biodiesel fuel has inherent limitations which require that you understand and adhere to the following requirements if you use blends of Biodiesel greater than 5% but not greater than 20% (B6-B20). There are no unique restrictions for the use of B5. Use of blends greater than 20% is not approved. Use of blends greater than 20% can result in engine damage. Such damage is not covered by the New Vehicle Limited Warranty.
- Biodiesel fuel may gel or solidify at low ambient temperatures, which may pose problems for both storage and operation. Precautions can be necessary at low ambient temperatures, such as storing the fuel in a heated building or a heated storage tank, or using cold temperature additives.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.