Originally Posted by
PhilipA
Funny thing is that Nulon only recommends 5W-30 for TD5 and the site comes up with "may not be suitable for your car" for 5W-40 . Go figgure!
Its the same with several of the other oil sites
Perhaps it's because there's more to the correct oil selection than just the viscosity? There's other specs requirements also to be considered. Surely then the simple answer is if you want as xW-40 oil, and Nulon (or substitute any other oil brands) recommendation is not that, move onto the next as there's already established oil brands (e.g. Penrite) that offer this? Or at a minimum contact their Tech line and discuss it with them so that they can either explain why their recommendation is what it is, or confirm if the other would be a suitable substitute meeting the other considerations. Just seems strange to me to be trying to push with a non-recommended spec of oil from some brand...
The whole oil thing just seems overly complicated to me. For most folk, it's really as simple as pick your preferred brand (factors such as brand confidence, availability and price point can be considered here) and go with their recommendation. If you're in the know about oils then you might track your own path but if that's the case then you'd already know and have your reasons for doing so.
Mine - modified MY03 LT L318 Discovery 2a HSE Td5 15P
Hers - MY12 L319 Discovery 4 2.7L TDV6
Dads - MY12 L319 Discovery 4 2.7L TDV6
Sister-in-laws - MY98 LJ Discovery ES 3.9L V8
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