LOL I am just a layman whose profession is not even remotely related to petrochemicals. However, I certainly do believe in numbers and solid evidence and their practical implications.
[quote="ehalin, post:6, topic:1279365"]
And comparing a synthetic oil with mineral oil is like comparing horses with donkeys. Hope you know the difference between a horse and a donkey.
[/quote]
Please don't stoop down to personal attacks. It only reflects poorly on your good self. Yes, being a synthetic SHU has better shear strength but what's the point if you're still just going to run it for 5K km and then drain it? Delo 400 can also do that too while at the same time being far less costly and offer better anti-wear protection courtesy HDEO specific add-pack (ZDDP, Moly, Boron, etc.) aka heavy duty heroine lol.
[quote="ehalin, post:6, topic:1279365"]
Coming to the science part; yes both Delo and SHU has same viscosity at 100 deg. C since both of these are xW-40 weight oils. What matters is the cold viscosity i.e., Viscosity at 40 deg. C. Here Delo I am sure being a dinosaur era oil would have a viscosity > 120 cSt whereas SHU is around 80cSt. Now if you are a real scientist tell me which oil is better the one with 120cSt or the one with 80cSt?????
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LOL. You're entire argument was based on the premise that Delo is too thick aka heroine aka tractor oil and can destroy the naazuk 1GD. This is the sole reason I brought up viscosity cst@100 i.e. where an engine spends 99% of its time at. Viscosity cst@40 only matters on cold startup and keeping in mind Karachi winters 5w and 15w would have very similar viscosities at ambient temperature(which is below 40C in winters and near 40C in summers). Unless you travel to Skardu and other cold areas that are below 0C then yes a 5w40 would be better. Again, please refrain from your piss poor arguments of being a 'real scientist' and 'horse donkey' analogies when all it takes is a google search and some common sense lol.
[quote="ehalin, post:6, topic:1279365"]
SHU TBN is also > 10. so both these oils are better than Delo MGX and better suited for high sulfur diesel due to high TBN. go figure.
[/quote]
Again, high TBN and low viscosity are not the only two merits to look for in a diesel engine oil. Take Mobil oils for e.g. you can find 5w40 in both regular Mobil 1 and Mobil 1 Delvac, so what's the difference? It's the additional diesel specific anti-wear additives and friction modifiers in an HDEO spec oil. e.g. zddp, boron, moly, etc.. Whereas TBN is the ability of the oil to neutralize the acidic byproducts of combustion(Ca Mg carbonate additives) and nothing to do with wear protection.
Other senior members could correct me on this. People even use HDEO's in their petrol cars (old 91 accords etc.) for better wear protection and engine cleanliness!
[quote="ehalin, post:6, topic:1279365"]
I think you are impressed by the name "Heavy duty". You are not unique. We like our film heroines to be heavy duty as well
But "Heavy Duty" actually means tractor engine oils. This is your choice if you want your Fortuner use "tractor duty oil".
[/quote]
I am assuming you got swayed by the little "tractor" picture you saw on the Delo bottle. There are many more sophisticated diesel engines( e.g.BMW 730d) in the world running perfectly on HDEO's but I guess your ultra-sensitive 1GD would become a tractor if used an oil with a tractor picture on it. I bet you barely even off-road it. Please grow up.
[quote="ehalin, post:6, topic:1279365"]
Also keep in mind API ratings are not quality ratings.. These are minimum standards to comply with. So don't compare incandescent headlight of Mehran with LED bulbs of Fortuner since both comply with same road standards
[/quote]
This is beyond stupid lol. Why do you think standards are set in the first place? Is it not to ensure a minimum quality by defining baseline parameters for wear protection, high and low temp protection, additives, lubricity, etc? API CJ-4 vs API CF and ACEA E7 E9 vs A3/B4 are not even same standards, one supersedes the other. Also, you were the one in the first place who was hell-bent on using an oil with only API CF and ACEA A3/B4 ratings, nothing more nothing less.
To sum it up. I would choose a fully synthetic HDEO like Delvac 1 or Mobil TDT in 0w40, 5w30 or 5w40 viscosity if money was no concern. Delo 400 mgx for the best bang for the buck. PCMO synthetics like Mobil 1 0w40 or SHU 5w40 if I can not procure Delvac 1 or Mobil TDT. For clarification, these are all excellent oils for the 1GD IMO. As of this moment, I am using Mobil 1 Delvac 5w40 because my pocket allows it and it is available for me.
Again, you may cross-reference everything and if I'm wrong, I would be happy to learn something new. Cheers.
Also, I think mods should merge this thread with other fortuner oil threads and move it to the fortuner section.
