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.

11605 Motor Oil

Product ID: 295156801

Details

Brand
Red Line
Liquid Volume
1 Gallons
Package Information
Bottle
Vehicle Service Type
Car Truck
Viscosity
5W50

⛽Improved fuel economy & ring seal

🔥5W-50 Viscosity - extreme temp stability

🛡️High detergency for extended drain intervals

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€ 436.63

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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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

Viscosity	5W 50
Brand	Red Line
Vehicle Service Type	Car, Truck
UPC	083522116053 083522116251
Automotive Fit Type	Vehicle Specific Fit
Global Trade Identification Number	00083522116053
Manufacturer	Red Line
Size	Gallon
SAE J300 Viscosity Grade	5W-50
Model	11605
Product Dimensions	17.15 x 11.43 x 27.94 cm; 3 kg
Item model number	11605
Manufacturer Part Number	11605
OEM Part Number	11605
Colour	Red
Assembly Required	No
Country of Origin	USA
Item Weight	3 kg

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