Crate HEMI® Engine Kit Instruction Sheet www.mopar.com
Rev Level 5.0 – K6862625 25
Break-In/Maintenance
Follow this procedure below in the correct order and read all content prior to starting your new crate
engine.
Engine Oil
For best performance and maximum protection under all types of operating conditions, the
manufacturer only recommends full synthetic engine oils that meet the American Petroleum Institute
(API) categories of SN.
The engine oil filler cap also shows the recommended engine oil viscosity for the engine. Use synthetic
engine oils provided the recommended oil quality requirements are met, and the recommended
maintenance intervals for oil and filter changes are followed. Synthetic engine oils which do not have
both the engine oil certification mark and the correct SAE viscosity grade number should not be used.
The manufacturer strongly recommends against the addition of any additives (other than leak detection
dyes) to the engine oil. Engine oil is an engineered product and its performance may be impaired by
supplemental additives.
To assure proper engine lubrication, the engine oil must be maintained at the correct level. Check the oil
level at regular intervals, such as once a month. The best time to check the engine oil level is about five
minutes after a fully warmed engine is shut off. Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings. Maintain the oil level in the “SAFE” range. Adding 1.0
quart (.95 liters) of oil when the reading is at the bottom of the “SAFE” range will result in an oil level at
the top of the “SAFE” range on these engines.
Overfilling or underfilling will cause oil aeration or loss of oil pressure. This could damage your
engine.
Under no circumstances should oil change intervals exceed 6,000 miles (10,000 km) or six
months, whichever occurs first.
Do not use chemical flushes in your engine oil as the chemicals can damage your engine
Coolant
Use only MOPAR Antifreeze/Engine Coolant (OAT coolant conforming to MS.90032) 10 Year/150,000
Mile Formula or equivalent in the engine’s cooling system.
Mixing of engine coolant (antifreeze) other than specified Organic Additive Technology (OAT)
engine coolant (antifreeze) may result in engine damage and may decrease corrosion
protection. OAT engine coolant is different and should not be mixed with Hybrid Organic
Additive Technology (HOAT) engine coolant (antifreeze) or any “globally compatible” coolant
(antifreeze). If a non-OAT engine coolant (antifreeze) is introduced into the cooling system in an
emergency, the cooling system will need to be drained, flushed, and refilled with fresh OAT
coolant (conforming to MS.90032) by an authorized dealer as soon as possible.
SAE 5W-20, Synthetic API Certified
FCA Material Standard MS-6395
SAE 0W-40, Synthetic API Certified
FCA Material Standard MS-12633