Would this be great for a 335i N54 with heavy performance mods?

Absolutely, I run it in my Shelby GT350

Can i use it on a 2005 bmw 545i?

The 2005 545i uses 5w30 or 0w40 when in temperatures over 50 degrees F.

Is this good for an old/worn opel zafira b 1.9 cdti, or is it a bit too thick for the system?

I’m sorry I don’t know about your particular car however it went into my 2020 Shelby gt 350 easily, as it is the required viscosity. The oil was not thick like the old 20/50 weight oil it was actually easy to pour. The oil pressure typically runs over 100 lbs in the Shelby if that helps.

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Red Line 11605 Motor Oil

Product ID: 295156801

Details

Brand
Red Line
Liquid Volume
1 Gallons
Package Information
Bottle
SAE J300 Viscosity Grade
5W-50
Vehicle Service Type
Car Truck

⛽Improved fuel economy & ring seal

🔥5W-50 Viscosity - extreme temp stability

🛡️High detergency for extended drain intervals

Description

🛢️ Power your drive with the oil that champions trust!

FUEL SMART FORMULA - Boosts fuel economy while maximizing engine power and efficiency
PROVEN TRACK RECORD - Trusted by Shelby GT500, Ford GT, and Range Rover enthusiasts worldwide
RACE READY VISCOSITY - 5W-50 grade engineered for peak performance under extreme conditions
CLEAN ENGINE GUARANTEE - Superior detergency keeps your engine spotless for longer drain intervals
UNCOMPROMISING PROTECTION - High temperature stability and oxidation resistance for ultimate engine longevity

Red Line 11605 Motor Oil is a full-synthetic ester/PAO formula designed for high-performance cars, trucks, and marine engines. With a 5W-50 viscosity grade, it offers superior high-temperature stability, enhanced fuel economy, and exceptional engine cleanliness. Recommended for iconic vehicles like the Shelby GT500 and Ford GT, this oil ensures extended drain intervals and uncompromised engine protection.

Specifications

ASIN	B004BORLQM
Automotive Fit Type	Vehicle Specific Fit
Brand Name	Red Line
Compatible with Vehicle Type	Car, Truck
Container Type	Bottle
Customer Reviews	4.9 4.9 out of 5 stars (69)
Global Trade Identification Number	00083522116053
Item Weight	3 Kilograms
Liquid Volume	1 Gallons
Manufacturer	Red Line
Manufacturer Part Number	11605
Model	11605
Number of Packs	1
Part Interchange Info	11605
SAE J300 Viscosity Grade	5W-50
Size	Gallon
UPC	083522116053 083522116251
Unit Count	128.0 Milliliters
Viscosity Level	Medium to High
What Is In the Box	Per Item Description

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