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Conservative estimates for oil-change intervals used to be as low as 3000 miles, before significant improvements in fuel-delivery systems, engine materials, manufacturing methods, and oil chemistry.
Modern lubricants can extend the time between oil changes to up to 7,500 miles; vehicles using full synthetic motor oils might wait up to 15,000. Even Jiffy Lube has backed off the 3,000-mile ...
With modern synthetic oils and new tests such as BMW's LL ("long life") oil specifications, most current cars can go over 6,000 miles (9,700 km) before needing an oil change. Even most modern conventional oils (also called mineral oils) can take a car engine at least 5,000 miles (8,000 km) before needing an oil change. [1] [2] [3] [4]
So periodic oil and filter changes should still be done with synthetic oil, but some synthetic oil suppliers suggest that the intervals between oil changes can be longer, sometimes as long as 16,000–24,000 kilometres (9,900–14,900 mi) primarily due to reduced degradation by oxidation.
The 1.8-litre petrol engine in the Passat and Audi A4 has a lower oil capacity than transverse applications of the same engine (4.6 US quarts (4.4 L) in transverse, 4.3 US quarts (4.1 L) longitudinal), and may suffer from oil sludge problems as a result, if not changed at regular intervals with fully synthetic oils.
Oil prices could soar more than 60% by early next year if conflict in the Middle East continues to escalate, according to Citi. The bank said oil prices could go as high as $120 per barrel in the ...
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