Comments by "Bo McGillacutty" (@Mrbfgray) on "Does Liqui Moly MOS2 Work? Let's find out!" video.

  1. Kevin Bednarz Gear ratios are part of it but have been optimized a century ago, the entire machine must be carefully matched. Nothing can diminish the extra energy needed to accelerate, NO condescension intended-- it's simple--Everything else equal; add 20% weight (closer to your example) and increase acceleration fuel consumption by 20% (only one piece of the energy required to move a car), once up to speed weight doesn't cost a lot of fuel but some. At speed: aerodynamic drag, rolling resistance (tires against the road), and inherent drive train..engine, trans, and differential(s) efficiencies/inefficiencies become dominant. . In stop and go city driving a big SUV say, any heavy vehicle, will be automatically irrevocably penalized on MPG for repeat acceleration of extra wt., but aerodynamics don't count for much then. Make sense? :-) At sustained 80 mph say, punching a hole in the air is likely where most of power/fuel is going, not weight so much, wt. only increases rolling resistance and a few minor effects by itself at constant speed. Air drag goes up by about the speed squared, so going 80 mph costs 4X fuel (the drag component of consumption) as going 40 in any given vehicle....pardon the tangent. ((I don't call self a Mechanical Engineer, I have the degree but not the job title and I don't believe one should rely on labels, paper merits, etc., but the above is intuitive level basic physics, engineers only work within the laws of nature))
    3
  2. Open Roader You can apply the same logic to high quality motor oils, they too should be engineered and difficult to improve on.
    1
  3. Enter The Hunter You can probably find one of those '80's American econoboxes for 8 cents per pound, go for it. Hope you don't get in a fatal fender bender! They are scrap value at best with a full tank of gas, engineered to the high standards of your curbside garbage bin and handle about as nice. You may as well complain about your phone having too many computers.
    1
  4. Enter The Hunter OK. Those are valid points. No problem for you personally however, just own and operate older cars which are cheap to buy anyway. I don't buy new cars either, mainly because I like to let someone else suffer the steep first few yr.s depreciation which is by far the biggest expense of any new car, especially more expensive ones. I share some of your grievances about losing individual control and responsibility for the car. My 2011 BMW M3 doesn't even have a dipstick, one of my biggest complaints about the entire car. I love the fact that it can measure the oil level and quality automatically and display it for me but I like to SEE and FEEL the oil between my fingers....at least they put the oil filter right up there next to things like the coolant, brake and steering reservoirs, couldn't be easier to service that part. I will simply change oil far more frequently than recommended in part because I can't see it as easy as I like. The stability control is TOO intrusive also, still after all these yr.s, however I can turn it down or off and have all the fun I want, that fixes that issue. The M3 doesn't have all the other driver aids as it's a drivers car anyway, intended for engagement and fun including manual trans for me and frankly it seems bran new to me even 8 yr.s old, not missing much that I want.
    1
  5. Kevin Bednarz I don't know the particular models you are talking about but in the first instance it's probably well under 100 hp and 30 or 40% lighter vehicle than the other which probably boasts something like 250 hp. Extra weight degrades everything about a vehicle including fuel economy, but it's what happens when you add tons of luxury features and safety equipment. If your going to be in a serious collision you want to be in the newer one, guaranteed to be FAR safer in every respect. And your not going to be happy with the performance and features of the '87.
    1