Anyone have experience with Motorcraft oil? While shopping for oil, I saw that they have a synthetic blend that is only $2.49 a quart. All others were $2.89 or more.
The label on top appears to meet the regular standards set forth by manufacturers.
Check on bitog.com - they're bound to have discussed it there.
It may be great stuff, but personally I wouldn't buy a pre-made blend. Why? Because you don't know what the percentage blend is. For all you know, they're charging a 60/40 blend price and giving you a 3/97 blend. Mix same-brand synth and non-synth to your own proportions.
Bill Putney (To reply by e-mail, replace the last letter of the alphabet in my address with the letter 'x')
Brent - Are there oil pumps in cars that are not gear type? What specific changes have been made to give that result, and why were those particular changes done - most likely to imporve some other aspect?
SI? is that an API oil classification? If so, is that non-diesel application? Are you saying diesel oils in general have tooo much detergent to be used in non-diesel engines? I need you to translate your statement.
Bill Putney (To reply by e-mail, replace the last letter of the alphabet in my address with the letter 'x')
Assuming you use the correct grade for the application...
That's the theory, but its being at least partially debunked as time passes. Its starting to look like the zinc-free high pressure additives work pretty well even in slider-cam engines.
WTF? The only possible problem with using diesel-spec oils in a spark-ignition engine is if the engine is already a bad oil-burner, in which case the diesel engine oil can potentially form slightly more combustion chamber deposits.
No gear pumps were ever used in any B or A series Chrysler v8 or slant-six, those were gerotor pumps like the slant-six pumps shown here:
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Also the 3.3/3.8/3.2/3.5/4.0 v6 engines use gerotor pumps, but they're driven directly by the crankshaft instead of by a quill shaft off the camshaft. I *think* your 2.7 also uses a gerotor pump just like the 3.3 family, but I'm not sure, as you know, I tend to walk the long way around when a 2.7 is in the room.... ;-)
The POS vw-based engine in the early Horizon/Omni used a gear pump, IIRC :-)
The gerotor type is the most common today. This is different from the traditional gear type pump which is still usually called a "gear pump". The gerotor pump takes less energy to turn.
Oils are approved for spark ignition or compression ignition engines or both, usually abbreviated SI or CI. The API designations start with a S or C as a consequence.
SI engines can burn gasoline, E85,E100,M85,M100, propane, natural gas, amd many other fuels and for some of those specific oil formulations exist, but generally gasoline is the assumed fuel.
CI engines burn various petroleum distillates, and now, some biofuels too, but for CI use diesel is the assumed fuel. Fuel type in either case is a consideration of what the oil has to protect against.
As well, SI engines have higher peak combustion chamber temperatures. The calcium and barium detergents in oils bother diesel engines much less and so diesel-only oils can use a lot more of these detergents than can spark ignition oils. SI engines that burn a lot of oil by design usually use a nondetergent, magnesium detergent or ashless dispersant oil. Harley Davidson has been selling magnesium detergent oils for decades. Pratt and Whitney preferred entirely ashless dispersants so the rest of the aircraft engine manufacturers went along. I have owned various air cooled engines and used nothing besides Aeroshell AD aircraft oil in them with good results. I have also used Aeroshell in many liquid cooled SI car engines and even in CI engines such as the Mercedes OM 616 and the two cycle 71 Series DD although those oils are not optimum for these applications.
In modern ticky-tack car engines use what the manufacturer recommends unless you have a specific reason to deviate.
In diesels use a good diesel oil like Shell Rimula or its Chevron Delo or similar equivalent. Use only single weight oils in DD two cycle engines and in any other engine with holes in the cylinder walls!
In air cooled engines use an ashless dispersant oil, Aeroshell being far and away the most available.
In classic car engines find out what is working for those engines today and use that. Most rebuilt engines of any vintage are running aftermarket performance cams, lifters and valve springs and retainers as well as improved bearing materials, and generally speaking, even if one wanted to use "the factory recommended oil" it isn't available any more in its original formulation. Besides, there is no warranty deity looking over your shoulder. The oils sold at WalMart may or may not be good for these engines.
I tend to not like synthetics for material compatibility, and other reasons such as poorer corrosion protection UNLESS you are operating in very cold, very hot, or otherwise unusual conditions. True synthetic oils are very energy intensive to manufacture so don't think their use is necessarily "green". They should IMO be used in conjunction with a bypass filter and oil analysis program. I think bypass filters are a Good Thing and can do wonders for keeping an engine clean along with proper crankcase ventilation.
No they do not. The reason people don't use them in normal cars is because they are more expensive. However, diesel oils (ie: Delco and equivalent) are used all the time in standard passenger car engines that are used in stationary applications - like generators - where the engine is run intermittently.
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