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Hi fellow tl lovers!
Ive been struggling a while with my TL......but i am not sure which oil is good? I want to switch to 10w40 shell helix oil? Would this idea cost me my motor? Any advice?
Thanks
 

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Think about what oil technology was like 25 years ago when the TL was designed. Things have come on quite a bit since then. As long as you don't spend all your time on the back wheel the TL engine is pretty robust. R's more so than the early S's. You could put Tesco semi-synthetic in there and not worry about it.
 

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I've used 10/40 semi synthetic of one form or another since I bought my TLS nearly 22 years ago. I'm toying with the idea of putting in 15/50 at my next oil change. It works better in my GSA especially when it's really hot. I don't thrash the TL any more like I used to at the nurburgring and on track days so it has a much gentler life nowadays.
 
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