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Rollins, Thank you for the all the info. I only have the following Rimula oils available Rimula Ultra 10W-40 Rimula D 10W-30 <a href="http://www.epc.shell.com/documentRetrieve.asp?documentId=36125286" target="_blank">http://www.epc.shell.com/documentRetrieve.asp?documentId=36125286</a>...

<div class="ubbcode-block"><div class="ubbcode-header">&nbsp;Originally Posted By: tdi-rick</div><div class="ubbcode-body">What's the fuel sulphur % in SA now ? If >50ppm, the Helix Ultra would be fine, if >500ppm, use the oil with the higher TBN (Rimula <img...

The Mobil SHC has sulphated ash percentage of 1.8 but I cannot find any info on this for the Shell Helix Ultra.

I have done some more homework.. This is the same engine used in the E270 CDI Merc. Shell Helix Ultra 5w40 has a MB229.3 spec Mobil Delvac 1 SHC 5W40 only a MB228.5 spec.

<div class="ubbcode-block"><div class="ubbcode-header">&nbsp;Originally Posted By: PT1</div><div class="ubbcode-body">The Shell Helix 5w40 is factory fill for Ferarri V8 engines so you should be fine with it. </div></div> The OM647 is a 5 cylinder diesel though!

Thanks guys, I think I will stay with Helix Ultra then.

Thank you for the "Welcome" Johnny. Why would you prefer the Helix Ultra? Sprintman - Excuse the ignorance but what does "Auto-RX/rinse clean" mean?

I am new to this forum. I drive a 2004 Jeep GC 2.7 with the Mercedes OM647 fitted. The dealer used Shell Helix Ultra 5W-30AB but this oil is not available in South Africa anymore. The vehicle has completed 100,000 kms (60,000 miles). Will I be safe to move to Shell Helix Ultra 5W-40 or even...