Simple Rainwater Harvesting Formula-For every 1â of rain and 1,000 square feet of impermeable surface (roof, driveway, etc), about 620 gallons are generated. Meaning, you can capture about .62 gallons per sq ft. To figure out the square footage of a surface, multiply the width x length.
That synthetic oil gets changed at 7,000 miles. But regular conventional oil must be changed every 3,000 miles. My local mechanic that I go to is the the most trustworthy mechanic around. I asked him what if I go 5,000 miles between oil changes.He said, you will ruin your engine eventually.ut regular conventional oil must be changed every 3,000 miles. My local mechanic that I go to is the the most trustworthy mechanic around. I asked him what if I go 5,000 miles between oil changes. He said, you will ruin your engine eventually.
Although most people still have the oil in their car changed every 3,000 miles, most experts suggest that synthetic oil only needs to be changed after 5,000 to 7,500 miles. However, some manufacturers list oil change intervals as high as 10,000 or even 15,000 miles when using synthetic oil.