Heavy Duty Engine Oil (HDEO) Frequently Asked Questions
Your official resource for frequently asked questions related to Heavy Duty Engine Oil (HDEO) and other diesel oil questions that are answered by the experts within our Shell technical team.
Frequently Asked Questions
I was looking for clarification to learn if Shell Rotella T6 0W-40 Full Synthetic Heavy Duty Engine Oil is JASO MA/ MA2 approved?
Can extended life coolants be mixed together and how do I correct problems if my coolant additives will not provide the correct protection?
With winter coming, what should drivers and fleets be aware of when checking their coolant for cold weather driving?
How should diesel exhaust fluid (DEF) be handled to avoid reducing its shelf life in a shop or by drivers?
Can Shell Rotella oils help to reduce the amount of ash in a diesel particulate filter (DPF)?
My owner's manual says that in temperatures above 0° F to use 10W-30 oil, but I do not see that Shell Rotella offers a full synthetic in that grade. I only see 5W-40 oil. Could I use the 5W-40 in hotter temperatures?
Are lower viscosity oils really better for my engine?
1 Shell Rotella® T6 demonstrates better low temperature flow in SAE J300 requirements including MRV (ASTM D4684) and CCS (ASTM D5293) compared to conventional 15W-40
2 Shell Rotella® ELC Nitrite Free may be used up to 1,200,000 miles or 24,000 hours of operation in Class 8 trucks reducing maintenance costs and downtime compared to conventional, fully formulated AFCs. Requires full use of Shell Rotella® ELC Nitrite-Free 50/50 Coolant + Antifreeze in the system and proper maintenance. Proper maintenance as detailed at shell.us/coolants. Follow OEM recommendations for specified maintenance. Passenger car maintenance and other commercial application requirements vary.
3 Compared to CK-4 minimum levels
4 Compared to SAE 15W-40 heavy duty engine oils.
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