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Grumpy Bear

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Everything posted by Grumpy Bear

  1. Middle 30's last two nights. Frost warnings in effect. And my tomatoes were just getting in stride.
  2. Incorrect is not the same thing as imprecise and I agree that the sample set it to small to know much of anything but the result. I agree as well with the reasons. However the sample size, especially of the first case, is large enough to reveal the 'central tendency' with a very high degree of 'probability'. If they don't match it is indeed "Incorrect". They match or they don't. Kind of the definition of correct, right? It's "precision" is dictated by the 'standard deviation'. If that falls within 1 sigma it would be of little concern. I keep both numbers in my spreadsheets and the delta and calculate the standard deviation of the difference. It's never ever zero. Some vehicles it's very close and some are not even in the same zip code.
  3. Take note that the cold performance numbers for each grade are a MAXIMUM value. Take note that the HTHS numbers are a MINIMUM value. Take note there is no spec for 40 C viscosity (there is an expected range but not a spec) Take note that ONLY the 100 C viscosity has an upper and lower limit. There are literally 5W30 oils whose low temperature performance will meet the 0W spec and whose HTHS will meet the specs of a 40W. There are also oils whose numbers 'just' meet the specs. It's a marketing wet dream. There are oils that exceed specs primarily on base oil selection, as @customboss noted and there are oils that must use additive chemistry to meet those specs.
  4. Butterkäse https://www.wisconsincheeseman.com/blog/cheese-nation/butterkase-wisconsins-little-known-butter-cheese/ I don't know how widespread this cheese is but if you get a chance to try it, don't pass. I did an Avocado toast today which I've featured in a previous post with the addition of some very thin slices of this cheese and was very happy with the result. It didn't hurt the tomato was out of my garden picked in the last 12 hours or that I've sort of perfected the toasting of the multigrain artisan bread I love so much. Cracker like crunch all the way through. But the cheese..... set it off.
  5. Going to @customboss point. Take note that the cold performance numbers for each grade are a MAXIMUM value. Take note that the HTHS numbers are a MINIMUM value. Take note there is no spec for 40 C viscosity (there is an expected range but not a spec) Take note that ONLY the 100 C viscosity has an upper and lower limit. There are literally 5W30 oils whose low temperature performance will meet the 0W spec and whose HTHS will meet the specs of a 40W. There are also oils whose numbers 'just' meet the specs. It's a marketing wet dream. There are oils that exceed specs primarily on base oil selection, as @customboss noted and there are oils that must use additive chemistry to meet those specs.
  6. In my personal stuff I've run Red Line HP for decades but I'm in somewhat of an exploring phase. I don't actually have a "go to" SAE Grade viscosity. I have a laundry list of features I look for.
  7. Food for thought: iseecars.com says that only 0.3% of all vehicles sold in the USA go past 300K, 1.2% of all vehicles sold in the USA make it past 200K miles but 95-98% will pass 100K. So...you could also say; Once past 100K that 98%+ of the remaining vehicles FAIL.... Which begs some serious questions. When one says "This motor was designed to use a DEXOS 0W20!", (for example) Does that not say... "The design is to fail"?
  8. About once a year for me. I drive 12K to 25K a year and do it normally after harvest. Dustiest time for the Midwest. I also have two that live in the garage and don't accumulate 10K over several years. They get changed about once a decade.
  9. Purolator PL22500 FRAM XG10575 Royal Purple 20-500 AMSOIL EA017 AC-Delco UPR63R Yes, pretty much in that order. Purolator PL and FRAM XG according to what data I have accumulated filter the finest. Purolator gets the nod on it's bypass valve spring design. Royal Purple and AMSOIL EA are very close to the top two and the PR gets the nod on price almost every time. AC Delco UPR is on the list as the OP seems to want to stay with a GM filter and of those filters the UPR is the best construction. Purolator BOSS and Mobil 1 don't make my cut as the swap filtration for longevity by using a 'looser' media instead of more surface area.
  10. There is viscosity and then there is viscosity Last post I talked about the effect oil temp has on MPG and I think everyone knows oil temp is a proxy for viscosity. The hotter the oil the less resistance it has to flow. The easier a thing moves threw it. Cold oil is like wading chest deep in wet cement. Warm oil like wading in water and hot oil like wading in air in an illustrative way. Not in an absolute way. More effort = more fuel used. The differences are magnified greatly under 75 F as you can see in the chart below. This time of year you really see a hit in the fuel usage and more so if your commutes are short. Even 5W20 is 5X more resistant to flow at 25 F than it is at 125F. A change from 10W30 to 0W30 will have more positive effect on you fuel economy than a move from 5W30 to 5W20. That said not every 5W30 behaves the same. Nor does every 0W20 behave the same. I've shown how temperature effects the mpg and how SAE grade does and how SMOOTH is a player. Next is 5W30 vs 5W30 choices.
  11. https://www.fram.com/oil-filter-xg10575 16-28 psig for this XG10575. Two basic types of bypass springs. Coil which is pretty precise. and the spring steel sheet which gives a wider range. The Purolator PL uses a coil the FRAM XG uses the spring steel sheet.
  12. I make a deal with my pets. I won't take one second of life from you that you wish to live. I won't make you live one second longer than you wish. That deal, for me, does not have a price. That doesn't mean I'd be unwise. He needs a knee at 12 he gets it. He has liver cancer....nite-nite sweet prince.
  13. My top five in this size: Purolator PL22500 FRAM XG10575 Royal Purple 20-500 AMSOIL EA017 AC-Delco UPR63R
  14. Hot and Cold You're running down the road fully warmed up and your vehicle will get 35 mpg. (blue line) But how does it behave before that? The yellow solid line is MPG vs Units of Distance and it follows a thermal constant. In this graph it took about 13 units of distance to reach 35 mpg. The area under the curve is the yellow dotted line. In this case 29.7 mpg. This is how your truck behaves mpg wise dead cold. The solid read and dotted red are the curves drawn from a stop after being fully warmed. Once hot, it takes a shorter distance to get the same average...and because it does, the area under the curve is a higher percent of the the perfect number. In this case 32.9 mpg. When you are on long trips this the reason you second tank is always better than you first. Hopefully you can understand that if you distances are shorter you never reach 'perfect' and the area under the curve will fall even further. Short hopping to less than hot is a mileage killer and also a fact of life for most. In stop and go driving you stitch together a combination of hot and cold, stop and start. sitting in bank line or drive in to get even a worse number. I'll link this to viscosity in the next post.
  15. Tip of the trees here since a week ago or so. Not all. Spotty. Beans however turn fast. Very wet September so far. Not too much but more than average.
  16. I've tried that. In fact the PCV is still installed but acts only as a check valve now. The valve cover has a shield but not a baffle so it over draws. I could stop that with a disengagement can and may someday. Room is limited. There is also a 'tunable' PCV available that isn't out of play.
  17. I didn't hear anything in the video that sent up red flags.
  18. Crankcase Ventilation Orifice. Now .050" This motor was not equipped with a PCV valve. They used an orifice. I just moved it's location to a place that didn't cost $500 a pop to clear it when it plugs. Other interesting stuff: 9/20/2022 250 miles. 7.083 gallons of fuel 'metered'. 35.3 mpg. New high for this unit. On pace to use a quart in 4 to 5 K miles.
  19. 185,000 Mile Service Scrape and paint the underside. Rust-Oleum oil based rust inhibitor white. Likely a loosing battle with the way it is constructed but.... This will take me a day or two. Want it done before cold weather (salt) season.
  20. Newton says in law one that a change of state requires an outside force and in law two that this force equals mass times acceleration. In law three he states the this force has an equal yet opposite counterpart. Force is the result of fuels energy acting upon the vehicle to produce motion. This energy is stored in the mass of the vehicle. That energy will be spent the question is on what and in what. Some will be spent on the equal and opposite reaction of road resistance. Tire and bearing friction. some will be spent on overcoming the resistance of the air it travels through. the excess moves the car down the road. But some is spent or actually wasted in the braking system. Every time you use your brakes you waste the fuel moving the car down the road to heat. In an ideal world you would let off the gas and allow the vehicle to coast to a stop or off the gas and coast down to the oncoming lower speed limit. The first is hard to do in traffic but the opportunity does present itself at times. The second isn't as hard as one might think. I drive on cruise control most of the time and have mapped in my mind nearly every inch of road within 175 miles of home base on nearly every roadway that can be traveled. I know exactly when to drop out of cruise and when to tap it back in to 'land it on a pillow'. Hills are your friends when slowing down and when speeding up. Less energy is spent accelerating going down the hill that up. Use that fact to your advantage. You will be amazed how many speed reductions are spaced so that tapping out on the higher will have you tapping in at the lower sign. Not perfect and weather has an effect but do it as a practice and you will find your marks and it will be come second nature. It will reward you with better mileage and fewer brake repairs and tire replacements. Most people drive like they are a Pulse Width Modulated digital signal. Either on the brakes or on the gas. Waiting until they get to within 50 yards of a stop sign to brake and brake hard then on the the throttle hard to 20 over the limit...rinse and repeat. Be analog in nature and habit. SMOOTH Smooth slow is faster than abrupt quick and has a huge impact on operating cost.
  21. Might want to think on that some more and ask the more relevant question, If it is still IN CONTROL does it matter?
  22. A sampling of speed vs time for two different settings. Zero in on the second chart. Two zones. First looks like 45/50 was the target and the second perhaps 55/60 and yet the average is but 48.3 mph. Over the course of a tank the average is more like a mix of these two charts but the point is the average is below the target. How much below has a HUGE impact on the measured mpg for the entire tank. As I mention in the first post wife drives (target) quite a bit higher than I do and yet my average is higher than hers which results is boost in fuel efficiency. Today I had Dizzy out on a 250 mile ride where I ran about 8 mph slower, 45-48 than my usual and yet for the tank the average speed was 42 mph. Same as when I drive 53-55. The result of that tank was a new personal best for this SUV. Her 60 to 75 mph target nets an average of 36 ish and 25 - 27 mpg. Let that mull around awhile in the gray matter. I averaged the same speed driving slower and netted higher mileage. Best mileage happens when your average speed is a high percent of your target speed. SMOOTH Dizzy's 5 mile steady state mileage vs speed. Mileage is vertical axis and speed is horizontal axis. I had to travel to a spot about 100 miles away to collect this data over the course of two attempts. Very good roads most flat that are very lightly traveled laid out in an equilateral triangle of 8 miles per leg near the Mississippi River in Rock Island County. Hot days over 85 F with winds under 5 mph. No A/C. https://onlinepubs.trb.org/onlinepubs/webinars/180314.pdf No matter what speed you decide you must drive that speeds fuel economy can be improved with driver behavior modification. Be SMOOTH......
  23. Richard Wardell on You Tube. Email him. 6L80E Guru He always answered my questions.
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