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      01-08-2020, 09:42 AM   #3
MarcoZandrini
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Drives: 2018 M240i
Join Date: Jun 2017
Location: Virginia

iTrader: (0)

Here are my recommendation:
1. Oil and filter: 5k-7k miles*
2. Manual transmission: 20k miles
3. Automatic transmission: 50k miles; full flush at 100k miles
4. Differential: 50k miles
5. Coolant: every 3 years

* OCI's depend on things such as:
1. Highway versus city driving
2. Track time, aggressive driving
3. Cold starts
4. Oil brand

I mention oil brand as Blackstone Labs sez that "consumer" synthetic oil last between 8k and 9k miles. Basically, the additives wear out. Consumer synthetic oil is actually made from either oil from the ground or natural gas. They have grade 3 base stock. Oils such as Redline and LiquiMoly are "true" synthetics as their base stocks are synthesized polymer chains. Their base stocks are grades 5 and 4, respectively.
Appreciate 1