Why is the answer to Q1 wrong? (I'm assuming for Q2 that the slightly different weight was the reason for the No reply.)

 

Your assumption is incorrect. I never posted anything about being wrong as you made no statement that could be responded to with right or wrong. Your responses to other posters indicates you wanted a yes or no answer, so I responded with no on both counts for the same reason. Upon reviewing the totality of you posts, I have come to the conclusion that you lack the necessary expertise to evaluate any improvements or detrimental effects of veering from factory specifications and therefore should not do so. If we were on a racing forum and discussing the issue at a more technical level the answer may have been very different, but that isn't where we are here.

Best advice I can give is that you educate yourself on any subject in which you are considering veering from your owners manual. I would recommend that you not consider relatively anonymous sources on an internet forum as an appropriate subject matter authority.

 

Perfection.... nothing more to say here.... end thread

 

 

 

Will you elaborate on why your answers were no?

 

Right now I'm thinking of using the options in the opening post unless someone can articulate the reason I shouldn't. They are much cheaper than Ford's products.

 

Go for it. You'll supply the forum with entertainment later. Generally, you get what you pay for. That is ages old wisdom that we all learned as kids.

 

The oils in the opening posts are almost assured to not provide any entertainment value. They are solid oils from good vendors.

(TBH, I find more entertainment from watching people pay huge markups to buy from the dealer "because its safer.")

 

Look at it this way - Ford spent millions of dollars on engineers to determine what is appropriate for your vehicle. These engineers have a lot more certifications and experience than Joe Random Internet Forum Guy. If you are technologically savvy enough to determine why another product might be a better solution (especially if you're some edge case - say you're operating in the Sahara, or Antarctica), then great. But, if your entire reason is cost, you're being penny-wise and pound-foolish.

Motor oil: You need something that meets the standards in the manual. I believe 5W30 is appropriate for the 2.7EB, as it is for the 3.5EB, but check your manual. Ford's Synthetic Blend is the minimum I'd use, or you can go Ford full synthetic, or to another brand with the same certs. The most common choices being Mobil 1 and Pennzoil Ultra Platinum. No, I don't buy into (sc)Amsoil.

Rear axle: You have yet to tell us *why* you want to change it... unless you're north of 100K, are having problems, or have submerged the axle, there's no reason to do so. But, again, use what Ford recommends. They are smarter than you.