Vehicle Questions and Answers
Welcome to the Vehicle Q&A Hub. Find answers to your automotive questions, share your experiences, and get expert advice on vehicle maintenance, troubleshooting, and more!
760 views
3 answers
The 2004 BMW 645Ci requires SAE 5W-30 synthetic motor oil and holds 8.4 quarts, including what's needed for the filter. For the best OEM match, consider purchasing Liquimoly Special Tec LL with part number 2248 2249 20124, priced at around $7.29 per quart. This oil can significantly enhance your older BMW's performance. Using synthetic oil offers advantages such as improved viscosity index for better fluid dynamics in different temperatures and seal conditioners to prevent leaks from expanding, which are crucial for maintaining an older vehicle like yours.
Pennzoil Platinum EURO 5W-30 is the oil I recommend for vehicles with the same model and year as mine. I have noticed that this oil results in quieter engine start-ups, especially in the cold winter months. I use 8 quarts of this oil for my vehicle. Additionally, I suggest changing the ZF automatic transmission fluid around every 50,000 miles. If your vehicle has over 100,000 miles, it is recommended to perform a partial fluid change instead of a full flush.
The 2004 BMW 645Ci requires SAE 5W-30 oil for optimal performance.